Amazing.
Incidentally, I was testing Jikkyō Oshaberi Parodius for a few hours last night on v03. I did make a comparison video where I ran attract mode until it made it through all four demos on both the cart and SD2SNES. However, it ended up being pretty boring: SD2SNES was just a few frames behind at the end of the 13+ minutes. I would say that's acceptable.

Also, I'm now pretty sure the slowdown when you max out your weapons (at least with Soitsu) is an issue on the real cart as well. I say "pretty sure" because I didn't do a side-by-side comparison, but it seems to be a similar level of slowdown, and is somewhat mitigated by a couple manual speed ups. So good job.