LG 75QNED90UPA vs Samsung QN77S84FAEXZA
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Choosing between the LG 75QNED90UPA and Samsung QN77S84FAEXZA? Both compete in the TV segment. Here’s how they compare across the specs that matter most for your home theater.
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Looking at overall performance dimensions: The LG 75QNED90UPA scores higher in form factor, room fit. The Samsung QN77S84FAEXZA leads in value, video quality, gaming performance, future-proofing. They score similarly in ease of use.
On the display side, the LG 75QNED90UPA uses a VA panel while the Samsung QN77S84FAEXZA uses QD-OLED, and screen sizes differ at 75" vs 77". OLED panels produce perfect blacks by turning pixels off entirely. QD-OLED adds a quantum dot layer for wider color. VA panels offer better contrast than IPS but narrower viewing angles. Mini-LED is a backlight technology applied to LCD panels, offering thousands of dimming zones for improved contrast. Bigger isn't always better — it depends on viewing distance. THX recommends a 36-degree viewing angle; SMPTE suggests 30 degrees minimum. Our viewing distance calculator helps find the sweet spot.
The Samsung QN77S84FAEXZA holds an advantage across more performance dimensions, but the LG 75QNED90UPA may still be the better pick depending on which specs matter most to your setup. See the detailed comparison table below for the full breakdown.
For most home theaters, the Samsung QN77S84FAEXZA is the stronger choice — it leads in 4 of 7 scored dimensions. The LG 75QNED90UPA makes more sense if you prioritize the 2 dimensions where it leads.
Performance Overview
Scores based on specs and category benchmarks (0–100 scale)
LG 75QNED90UPA
Samsung S84F OLED TV 77-Inch 4K Smart with Vision AI in Graphite Black
Detailed Specifications
| Specification | ||
|---|---|---|
| Price | N/A | N/A |
| Screen Size | 75" | 77" |
| Resolution | 4K | 4K |
| Panel Type | VA | QD-OLED |
| Backlight Type | mini-LED | none |
| Native Contrast Ratio | — | Self-illuminating pixels |
| HDR Formats | HDR10, HLG | |
| Refresh Rate | — | 120Hz |
| VRR | No | Yes |
| VRR Type | — | FreeSync Premium |
| ALLM | No | Yes |
| Smart OS | webOS | Tizen |
| Speaker Config | — | — |
| Dolby Atmos (Speakers) | No | Yes |
| HDMI Total Ports | 0 | 4 |
| HDMI 2.1 Ports | 0 | 4 |
| eARC Port | No | No |
| VESA Pattern | — | 400x300 |
| Processor | — | NQ4 AI Gen2 Processor |
| Model Year | — | — |
Key Differences
- Panel Type: LG 75QNED90UPA at VA vs Samsung QN77S84FAEXZA at QD-OLED. OLED panels produce perfect blacks by turning pixels off entirely. QD-OLED adds a quantum dot layer for wider color. VA panels offer better contrast than IPS but narrower viewing angles. Mini-LED is a backlight technology applied to LCD panels, offering thousands of dimming zones for improved contrast.
- HDR Formats: LG 75QNED90UPA at vs Samsung QN77S84FAEXZA at HDR10, HLG. Dolby Vision adds dynamic metadata that adjusts brightness scene-by-scene. HDR10 is the baseline. HDR10+ is Samsung's alternative to Dolby Vision.
- Smart OS: LG 75QNED90UPA at webOS vs Samsung QN77S84FAEXZA at Tizen
- Series Name: LG 75QNED90UPA at QNED90 vs Samsung QN77S84FAEXZA at S84F
- Screen Size: LG 75QNED90UPA at 75" vs Samsung QN77S84FAEXZA at 77". Bigger isn't always better — it depends on viewing distance. THX recommends a 36-degree viewing angle; SMPTE suggests 30 degrees minimum. Our viewing distance calculator helps find the sweet spot.
Which Should You Choose?
Choose Samsung QN77S84FAEXZA if you want:
- + larger 77" screen for more immersive viewing
- + better hdmi total ports
- + better hdmi 2.1 ports — hDMI 2
See Where These Rank
Check our editorial rankings to see how LG 75QNED90UPA and Samsung QN77S84FAEXZA compare to the rest of the field.
Best TV RankingsRelated Calculators
Specifications sourced from manufacturer datasheets and verified against retailer listings. Prices updated hourly from authorized retailers. Scoring uses our open methodology — products are never ranked, promoted, or suppressed based on affiliate commission rates.
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