Steam

However we don't know at what settings people play. So this still could be misleading for some. I love this new functionality (was waiting for a long time, its known before), but we need to understand what it does. In example for the title: https://store.steampowered.com/app/1361510/Teenage_Mutant_Ninja_Turtles_Shredders_Revenge/ the Steam Deck LCD has 57 FPS, while the OLED has 88 FPS. Both devices are pretty close in performance, so there are other reasons why this happens. OLED has a 90Hz display, so people try to tune the settings to reach that.

This data is really useful. But one should understand how this works. And in doubt check both systems. In fact, Valve should display both FPS.