NES emulators differences

[Jimboy00]

Hello together,

Yesterday I tried a couple of NES games on my RPi3.
I was not 100 per cent satisfied with the emulation, because some games had some minor glitches or in my feeling not the correct speed. For example, what I can remember: Rad Racer 2 had some glitches in the background. I tried only the default settings, because I had only less time yesterday and will perform further tests today/tomorrow.

Has anyone some experience with the different emulators and cores for NES and also for SNES, which want to share here?

A compatibility list would be maybe also a good idea for these systems, if there are some known issues for the default core, for example? ...or is it not so a hot topic, as my impressions were from yesterday?