Mouse sensitivity between renderers

[Bashe]

A bit of an oddball question, but I was curious to know if there's any change in the mouse sensitivity or feel between the normal software renderer and any of the non-y-sheared soft/hardware renderers. I ask because normally I play with the software renderer, and I I've tried to get the X and Y sensitivities for the mouse to be equal (1:1). I read that if you disable the mouse prescaling, then X needs to be twice Y, or Y half of X. I don't know if it's true, but it mostly feels like it as far as I can tell. I don't really have a good way to measure Y sensitivity accurately other than feel, so this is the assumption I'm working off of.

When I have a non-y-sheared renderer selected, the X/Y do truly feel like 1:1, but when I'm using just regular software, the Y sensitivity feels faster than it does on the other renderers. I'm suspecting it's just a case of how differently they visually appear that's just giving an illusion of being faster, but I'm not sure, and I wanted to see if that was the case.

[Graf Zahl]

The sensitivity is the same but since the visual feedback is different it may give a different impression.