I think, the OS is supposed to do something to improve the accuracy of small movements, while letting you whip across the desktop without using a lot of room on the physical desk.

I often do screenshot edits where I'm doing a rectangular select with pixel precision. It's not easy to click without it moving off by a pixel, but I manage.

The mouse itself is a factor! There is a difference!

I didn't pay attention to this this before, but I'm doing a direct A/B comparison. I plugged an old Dell wired mouse into the laptop, using it side-by-side with the tiny Logi M187.

The M187 covers the entire width of the desktop in about 1/3rd of the physical movement compared to the old Dell wired mouse. I don't even have to rotate the palm of the hand; if I just move it left and right with movements of the thumb and ring finger, it covers the desktop.

However, I can still cover the desktop on the Dell without lifting my wrist. The movement is larger; I hate it. :)

The mouse settings in effect must be the same for both; there are no independent mouse settings per device.