I'm as much a believer that Linux can get better performance than Windows because the less bloat, the best example is Blender which works almost twice as fast on Linux. That being said 25% increase on a game running on wine seems fishy.

Your video did not play correctly, also you didn't synced properly between the two at the start so it's hard to compare that both have the same settings, and on the screen at the end it shows windows is running in full screen and Linux in Borderless, not sure if this should make a difference but showcases that not every setting is the same. After the video crashed for the first time I skipped a bit ahead and saw that at one point you put the screen half-half, that's a good approach, but I also noticed that the right side had a character the left side didn't right at the start, that means that Wine is failing to render some stuff, or disabling some features which is usually what's happening when you get this massive performance differences, so the comparison might not be valid. An example would be if DXVK ray tracing implementation bounces the light less times than DX12 does, it would be almost indistinguishable but would have a performance boost (at which point my question would be to show me the benefits of bouncing the light more, but that's my opinion and not a technical analysis).

In any case, great video, even if something is different I couldn't see any significant difference in the screen when doing the side-by-side, and I don't think people who claim Linux is always worse would even know of the possibility of wine lacking some implementation therefore not rendering that.