•   Overview
•   Advantage of LG OLED77Z19LA
•   Advantage of LG 55SK9500PLA
•   Common Strengths and Weaknesses
•   Selected Features
•   Specifications

Here we are comparing LG OLED77Z19LA to LG 55SK9500PLA to reveal their common strengths and weaknesses as well as the differences between them which will help you in making a correct decision before the purchase. The LG OLED77Z19LA has 8K UHD (7680 x 4320) and the LG 55SK9500PLA has 4K UHD (3840 x 2160) resolution and they both support HDR.

We have evaluated the TVs from available features and specifications. LG OLED77Z19LA gets higher overall score in our ranking system which is based on the display specifications, video, audio and other features, connectivity and format support.

This section shows the features and specifications which are the reason to choose LG OLED77Z19LA over LG 55SK9500PLA.

	LG OLED77Z19LA	vs	LG 55SK9500PLA
Higher Resolution	8K UHD (7680 x 4320)	vs	4K UHD (3840 x 2160)
Backlight Dimming	Pixel Level Dimming	vs	Full Array Local Dimming
Color	Perfect Colour (Wide Color Gamut)	vs	NanoCell Color Pro
Higher Contrast Ratio	∞	vs	1600∶1
Lower Minimum Response Time	1 ms	vs	5 ms
Dolby Vision IQ		vs
AMD Freesync™		vs
NVidia G-Sync		vs
4K HFR		vs
2K HFR		vs
VRR		vs
HGIG Compatibility		vs
Filmmaker Mode		vs
Auto Low Latency Mode		vs
AI Picture	AI Picture Pro 8K	vs
Auto Genre Selection	SDR/HDR/Dolby HDR	vs
Face Enhancing	AI Picture Pro - Face + Body+ object Enhancing	vs
Image Enhancing	Image Enhancing on SQM	vs
Noise Reduction	Quad Step Noise Reduction	vs	NR
Deep Learning AI Picture		vs
AI Brightness		vs
True Color Accuracy	Pro	vs
Sharpness	Frequency based Sharpness Enhancer	vs
Dynamic Tone Mapping	HDR Dynamic Tone Mapping Pro	vs	Enhanced Dynamic Tone Mapping
More Speaker Channels	4.2 Channel	vs	2.2 Channel
Higher Speaker Power Rating	60W (WF:20W, 10W per Channel)	vs	40W (WF:20W)
AI Sound	AI Sound Pro	vs
Clear Voice	Clear Voice Pro	vs	Clear Voice III
WiSA Ready	Up to 5.1 Channel (Separate Dongle Purchase Required)	vs
Smart Speaker Compatible		vs
LG Smart Speaker		vs
Newer Bluetooth Version	5.0	vs	4.2
Apple Airplay	Airplay 2	vs
LG TV Plus App		vs
Smart ThinQ App		vs
HDMI Version	2.1	vs	2.0b
HDCP Version	2.3	vs	2.2
More RF (Terrestrial/Cable) Connection Inputs	3	vs	2
On-Screen Display Languages	37	vs	36
Amazon Echo Compatible		vs
AI UX		vs
AI Home		vs
AI Recommendation	Default: off	vs
Intelligent Edit		vs
Home Dashboard		vs
Apple HomePod		vs
Magic Link	Default: off	vs
360 VR		vs
Mobile TV On		vs
Wi-Fi TV On		vs
Bluetooth Low Energy On		vs
Instant Game Response	VRR/ALLM/HGIG	vs
Time Machine (DVR)		vs
AVI		vs
VP8		vs
AC4		vs
EAC3		vs
MP2		vs
More Tuners (Terrestrial/Cable)	2	vs	1

This section shows the features and specifications which are the reason to choose LG 55SK9500PLA over LG OLED77Z19LA.

	LG OLED77Z19LA	vs	LG 55SK9500PLA
Advanced HDR by Technicolor®		vs
DTS Digital Surround		vs	DTS-HD
Composite Inputs		vs	1 via A/V 3.5mm Jack
OGG		vs
RealAudio		vs
Higher Energy Efficiency Class	G	vs	A

OLED display on LG OLED77Z19LA

LG OLED77Z19LA has an organic light-emitting diode (OLED) display. This is a self-emissive display which can completely turn off individual pixels leading to the ideal black levels and better contrast during HDR compared to any LCD displays. This makes them to be the best choice for dark rooms. OLED enables a simpler internal structure than conventional displays. With just a few layers, OLED TVs are very lightweight and thin. OLED displays also have better viewing angles. However, they are not able to achieve such high brightness as modern LCD displays which makes them less suitable in bright rooms.

IPS Panel on LG 55SK9500PLA

LG 55SK9500PLA has an in-plane switching (IPS) panel. Such panels are not commonly used in LCD TVs as they suffer from light leakage which lead to the lower contrast and poor HDR experience. However, this type of panels can provide better viewing angles and color accuracy compared to the VA panels.

Full-Array Local Dimming on LG 55SK9500PLA

LG 55SK9500PLA has Full-Array Local Dimming technology with multiple zones throughout the display. Individual zones of LEDs can light up independently which enhances black levels, shadow details and decreases level of light bleed in dark parts of the image. This gives higher contrast with increased picture quality which is very important for HDR reproduction. Higher number of zones gives better control over local dimming and less blooming around the bright objects and subtitles. LG 55SK9500PLA has 50 zones.

HDR10

LG OLED77Z19LA and LG 55SK9500PLA support HDR10 which was announced on August 27, 2015, by the Consumer Technology Association and uses the wide-gamut Rec. 2020 color space. It is not backward compatible with SDR. It sends static metadata via video stream to the TV which calibrates its screen brightness and color according to that. HDR10 is technically limited to a maximum of 10,000 nits of brightness and uses 10-bit color which corresponds to 1024 shades of the primary RGB colors.

Dolby Vision

LG OLED77Z19LA and LG 55SK9500PLA also support Dolby Vision which is an update to HDR10 by adding dynamic metadata that can be used to more accurately adjust brightness levels up to 10,000 nits on a scene-by-scene or frame-by-frame basis and supports up to 12-bit color depth (4096 shades of RGB) and 8K resolution.

And in the end we display all the specifications which are present for both models.

Note: The following table shows only those details which are applicable for both models and excludes the ones that are applicable for only one model. If you want to see a full list of specs for each model please visit their individual pages here - LG OLED77Z19LA and here - LG 55SK9500PLA.

BASICS	LG OLED77Z19LA	LG 55SK9500PLA
Brand	LG	LG
Series	Z1 Signature	SK95
Model	OLED77Z19LA	55SK9500PLA
Size	77"	55"
Country	UK	UK
Release Year	2021	2018
Smart TV

DISPLAY	LG OLED77Z19LA	LG 55SK9500PLA
Display Type	OLED	NanoCell
Actual Size (Diagonal)	76.7"	54.6"
Resolution	8K UHD (7680 x 4320)	4K UHD (3840 x 2160)
Refresh Rate	100 Hz/120 Hz	100 Hz/120 Hz
Screen Design	Flat	Flat
Backlight Dimming	Pixel Level Dimming	Full Array Local Dimming
Color	Perfect Colour (Wide Color Gamut)	NanoCell Color Pro
Viewing Angle	Perfect Viewing Angle	Wide Viewing Angle
Panel Bit Depth	10 bits	10 bits
Color Depth	1.07 Billion	1.07 Billion
Contrast Ratio	∞	1600∶1
Minimum Response Time	1 ms	5 ms

VIDEO	LG OLED77Z19LA	LG 55SK9500PLA
3D Capability
HDR10
HDR10+
Dolby Vision
Dolby Vision IQ
HLG
Advanced HDR by Technicolor®
IMAX Enhanced
AMD Freesync™
NVidia G-Sync
4K HFR
2K HFR
VRR
HGIG Compatibility
Picture Processor	α9 Gen4 AI Processor 4K	α7 Intelligent Processor
Upscaling	AI 8K Upscaling	4K Upscaling
Blacks	Perfect Black	NanoCell Black
Frame Interploation Technique	TruMotion 200	TruMotion 200
Frame Interpolation Frequency	200 Hz	200 Hz
Filmmaker Mode
Auto Low Latency Mode
AI Picture	AI Picture Pro 8K
Auto Genre Selection	SDR/HDR/Dolby HDR
Face Enhancing	AI Picture Pro - Face + Body+ object Enhancing
Image Enhancing	Image Enhancing on SQM
Color Enhancer	Advanced Color Enhancer	Dynamic Color
Noise Reduction	Quad Step Noise Reduction	NR
Deep Learning AI Picture
AI Brightness
True Color Accuracy	Pro
Ultra Luminance	Pro	Pro
Sharpness	Frequency based Sharpness Enhancer
Dynamic Tone Mapping	HDR Dynamic Tone Mapping Pro	Enhanced Dynamic Tone Mapping

AUDIO	LG OLED77Z19LA	LG 55SK9500PLA
Speaker Channels	4.2 Channel	2.2 Channel
Speaker Type	Down Firing	Down Firing
Speaker Power Rating	60W (WF:20W, 10W per Channel)	40W (WF:20W)
Dolby Atmos
DTS Digital Surround		DTS-HD
AI Sound	AI Sound Pro
Surround Mode	OLED Surround	Dolby Surround / ULTRA Surround
Clear Voice	Clear Voice Pro	Clear Voice III
WiSA Ready	Up to 5.1 Channel (Separate Dongle Purchase Required)
Bluetooth Audio Playback
LG Sound Sync
Smart Speaker Compatible
LG Smart Speaker

CONNECTIVITY	LG OLED77Z19LA	LG 55SK9500PLA
Ethernet Input
Wi-Fi
Wi-Fi Direct
Wi-Fi Frequency	2.4 GHz, 5 GHz	2.4 GHz, 5 GHz
Wi-Fi Protocol	802.11a/b/g/n/ac	802.11a/b/g/n/ac
Bluetooth
Bluetooth Version	5.0	4.2
Apple Airplay	Airplay 2
LG TV Plus App
Smart ThinQ App
Chromecast
Google Home	Google Home device sold separately	Google Home device sold separately (This feature is not available in Republic of Ireland)
Virtual Assistant	Google Assistant	Google Assistant Built-in Google Assistant features require software update (This feature is not available in Republic of Ireland)
Works with Alexa	Alexa Built-In	Amazon Alexa device sold separately (This feature is not available in Republic of Ireland)
HDMI Inputs	4	4
HDMI Version	2.1	2.0b
HDMI Audio Return Channel (ARC)	eARC (HDMI 2)	HDMI 2
HDCP Version	2.3	2.2
HDMI-CEC	SIMPLINK	SIMPLINK
USB Inputs	3	3
USB 3.0 Ports
RF (Terrestrial / Cable ) Inputs	3	2
Component Inputs
Composite Inputs		1 via A/V 3.5mm Jack
RCA Audio Outputs
3.5mm headphone Audio Output
Optical Audio Output
RS-232C Remote
DLNA

OTHER	LG OLED77Z19LA	LG 55SK9500PLA
CPU Cores	4	4
GPU Cores	2	2
Operating System	webOS	webOS
Internet Browser	Full Web Browser
Electronic Program Guide (EPG)	8 days	8 days
Application Store	LG Content Store	LG Content Store
On-Screen Display Languages	37	36
LG AI ThinQ®
Speech to Text
LG Voice Search
Amazon Echo Compatible
AI UX
AI Home
AI Recommendation	Default: off
Intelligent Edit
Home Dashboard
Apple HomePod
Voice Recognition	Intelligent Voice Recognition	Intelligent Voice Recognition
Magic Link	Default: off
Audio Guidance (Text To Speech)
Gallery Mode
Multi-view
DIAL
360 VR
Mobile TV On
Wi-Fi TV On
Bluetooth Low Energy On
Instant Game Response	VRR/ALLM/HGIG
Screen Share
Time Shift
Auto Calibration
Time Machine (DVR)
HEVC	8K@60p, 10bit and 4K@120p, 10bit

VIDEO FORMATS	LG OLED77Z19LA	LG 55SK9500PLA
3GPP
AV1	8K@60p, 10bit
AVI
ASF
DivX
Flash Video
H.263
H.264
H.265
MKV
M2TS
MP4
MPEG-4
QuickTime
RealVideo
TS
VC-1
VP7
VP8
VP9	8K@60p, 10bit
VOB
VRO
WebM
WMV
Xvid

AUDIO FORMATS	LG OLED77Z19LA	LG 55SK9500PLA
AAC
AC4
AIFF
ALAC
APE
aptX
eAAC+
EAC3
FLAC
HE-AAC
LPCM
M4A
MIDI
MP2
MP3
OGG
RealAudio
WMA
WAV

IMAGE FORMATS	LG OLED77Z19LA	LG 55SK9500PLA
BMP
GIF
JPEG
JPS
MPO
PNG

TUNER	LG OLED77Z19LA	LG 55SK9500PLA
Digital Tuner	2	1
SAT Tuner
Analog Tuner	PAL/SECAM, B/G, D/K, I, SECAM L	PAL/SECAM, B/G, D/K, I, SECAM L
Digital Terrestrial TV System	DVB-T/T2	DVB-T/T2
Digital Cable TV System	DVB-C	DVB-C
Digital SAT TV System	DVB-S/S2	DVB-S/S2
Color system	PAL / SECAM / NTSC	PAL / SECAM / NTSC
CI+	CI+ 1.4	CI+ 1.4

GENERAL	LG OLED77Z19LA	LG 55SK9500PLA
Energy Efficiency	G	A
Power Supply	AC 100-240 V, 50/60 Hz	AC 100-240 V, 50/60 Hz
Power Consumption (In Standby)	0.5 W	0.5 W
Dimension Without Stand (W x H x D)	1717 x 984 x 32.2 mm	1229 mm x 708 mm x 63 mm
Dimension With Stand (W x H x D)	1717 x 1044 x 323 mm	1229 mm x 779 mm x 256 mm
Dimension of Package (W x H x D)	1895 x 1130 x 228 mm 74.61" x 44.49" x 8.98"	1360 mm x 810 mm x 207 mm
VESA Wall Mount
VESA Hole Pitch (W x H)	400 mm x 400 mm	300 mm x 300 mm
Weight Without Stand	42.6 kg / 93.92 lbs	17.8 kg
Weight With Stand	43.4 kg / 95.68 lbs	19.2 kg
Weight of Package (Gross)	56.4 kg / 124.34 lbs	23.8 kg

ACCESSORIES	LG OLED77Z19LA	LG 55SK9500PLA
Remote	Signature Magic Remote Control - PM21N	Magic Remote Control - AN-MR18
Universal Control Capability for remote
Magic Remote Control Compatible