SNES emulation is extremely accurate at this point - any modern/reasonably competent emulator handles this correctly. Shoutout to Near (RIP) here - they wrote an article on Ars which documents how we've reached this point.

https://arstechnica.com/gaming/2011/08/accuracy-takes-power-...

On top of this, most emulators allow you to run the game at faster speeds than the original. I haven't encountered a game yet where I wanted to do this, but the fact that it's available just shows how far emulation has come (and the wizardry that is involved in emulating an entire computer system).