Games run faster on SteamOS than Windows 11, Ars testing finds

Is this testing the same graphics performance / i.e. screenshot-accurate comparison vs Windows?

Shame you have been downvoted. That's a reasonable question no matter where you stand. Motion is important too, not just static screen-shots.

I am 100% team Linux but cross-platform benchmarking is rife with problems. Differences are often from not testing the exactly same thing or different defaults that trade-off safety/quality/perf and can in theory be changed. No point measuring only one side of a triangle whose ratios are a matter of taste.

A responsible benchmark would try and prove fidelity.