The specs side by side, with links to both product pages.
*Price sourced from Amazon.com. Last updated 2026-09-29. Price and availability subject to change.
| Spec | LG 27UP650K-W 27-inch Ultrafine 4K UHD… | UPERFECT 13.3" 4K OLED Portable… |
|---|---|---|
| Brand | LG | UPERFECT |
| Color | White | Black |
| Shape | Flat | Rectangular |
| Brightness | 400 cd | 500 cd |
| Resolution | 4K UHD 2160p | 4K UHD 2160p |
| Unit Count | 1 Count | 1 Count |
| Color Gamut | 0.95 | 150 |
| Pixel Pitch | 0.16 | 0.16 |
| Screen Size | 27 inches | 13.3 inches |
| Aspect Ratio | 16:9 | 16:9 |
| Display Type | LED | OLED |
| Model Number | 27UP650K-W | M133J03 |
| Refresh Rate | 60 hertz | 60 hertz |
| Adaptive Sync | FreeSync | FreeSync |
Already narrowing? Open each product page for the full spec sheet, FAQ, and a link to the current Amazon price: LG 27UP650K-W 27-inch Ultrafine 4K UHD… · UPERFECT 13.3" 4K OLED Portable…. Browse the full Gaming Monitors catalog or read our Gaming Monitors buying guide for tier picks. You can also compare up to four products side-by-side, jump to all categories, or check the benchmarks index for hardware-only matchups.