I get mouse stuttering on my Mac Mini if I'm using my computer incorrectly and I'm doing way too many things way too stupidly. I don't have a touchpad I don't even have an apple input device I just have a Bluetooth Logitech k830. But the stutter is system wide it's not just the mouse. If you're watching a video or if you're doing anything you could plainly see that Mac OS loses its ability to be real time for a little bit. But this happens to me very very rarely and I do use my Mac Mini all day everyday because it's my TV's computer and that's where I watch everything.
Edit: it's the cheapest model that came out at launch with the lowest memory and the smallest drive.