LG C4 55" vs Samsung S90D 55"
Side-by-side comparison of viewing distance, PPI, and specifications
Advantages of LG C4 55"
| Specification | LG C4 55" | Samsung S90D 55" |
|---|---|---|
| SDR Brightness | 296 nits | 250 nits |
Advantages of Samsung S90D 55"
| Specification | LG C4 55" | Samsung S90D 55" |
|---|---|---|
| HDR Peak Brightness | 1049 nits | 1500 nits |
| Color Gamut | sRGB 100% · DCI-P3 98.7% · Adobe RGB 96% | sRGB 100% · DCI-P3 98% · Adobe RGB 97% |
Identical
| Specification | LG C4 55" | Samsung S90D 55" |
|---|---|---|
| Screen Size | 55" | 55" |
| Resolution | 3840×2160 | 3840×2160 |
| Pixel Density (PPI) | 80 | 80 |
| Optimal Viewing Distance | 1.1m | 1.1m |
| Panel Type | OLED | QD-OLED |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 16:9 | 16:9 |
| Refresh Rate | 144 Hz | 144 Hz |
| Variable Refresh Rate (VRR) | FreeSync Premium | FreeSync Premium Pro |
| Response Time | 0.1 ms GTG | 0.1 ms GTG |
| HDR Certification | None | None |
| Contrast Ratio | 1:1,000,000 | 1:1,000,000 |
| Ports | 4x HDMI | 4x HDMI |
| Year | 2024 | 2024 |
Summary
Sharpness: identical
Both screens are retina at 250cm with identical pixel density (80 PPI). No difference in sharpness.
Brightness: advantage LG C4 55"
The LG C4 55" is 18% brighter in SDR (296 vs 250 nits), a noticeable difference for outdoor readability. HDR peak: 1049 vs 1500 nits.
All specifications
| Specification | LG C4 55" 2024 | Samsung S90D 55" 2024 |
|---|---|---|
| Screen Size | 55" | 55" |
| Resolution | 3840×2160 | 3840×2160 |
| Pixel Density (PPI) | 80 | 80 |
| Optimal Viewing Distance | 1.1m | 1.1m |
| Panel Type | OLED | QD-OLED |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 16:9 | 16:9 |
| Refresh Rate | 144 Hz | 144 Hz |
| Variable Refresh Rate (VRR) | FreeSync Premium | FreeSync Premium Pro |
| Response Time | 0.1 ms GTG | 0.1 ms GTG |
| HDR Certification | None | None |
| SDR Brightness | 296 nits (Better) | 250 nits |
| HDR Peak Brightness | 1049 nits | 1500 nits (Better) |
| Contrast Ratio | 1:1,000,000 | 1:1,000,000 |
| Ports | 4x HDMI | 4x HDMI |
| Color Gamut | sRGB 100% · DCI-P3 98.7% · Adobe RGB 96% | sRGB 100% · DCI-P3 98% · Adobe RGB 97% (Better) |
| Year | 2024 | 2024 |
Frequently Asked Questions
Which has better PPI: LG C4 55" or Samsung S90D 55"?
Both have 80 PPI.
Which has a closer optimal viewing distance?
Both require 1.1m for retina quality.
Methodology & Sources
Formula: Retina distance (cm) = 3438 / PPI. Displayed values are rounded for readability.
Sources: Official manufacturer spec sheets and product pages. Specs are normalized before comparisons.
Comparison winners are calculated metric by metric (higher is better for most specs; lower is better for distance/response time).
Last updated:
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