I'm not sure I understand the point that you're trying to make.

If you use Linux you can use more power to get higher clock rates, have a longer battery life, more stable framerate and a suspend feature that works.

It seems reasonable to say "ROG Xbox Ally runs better on Linux than the Windows it ships with"

It's like claiming a race car is only faster because it produces more horsepower... yes, that's the entire point and what we want.