I've never had any luck with Saturn emulation. I've heard its weird combination of like 5 different processors and some weird sound chip made it exceedingly difficult, and the few games I got to run, sounded like garbage But that was years ago, and supposedly better processors and graphics cards were going to make true emulation. So its definitely possible they will run better these days, if people kept working on them

I can't remember the details, but I think there was one Japanese one that ran really well. I think the rumor was that it was developed by someone who used to work at Sega, but then it was closed-source, so any hiccups it had, couldn't be fixed by other developers, and I'm not sure that person continued his work, so it could be a dead end