Quote Originally Posted by Bratwurst
I could be wrong but I also doubt the SNES carts employed mapper chips. That was an NES thing.
Yeah, as far as I know some of the later games simply had encryption (which would require a separate chip I believe) and graphical enhancers. A mapper only comes into play when you hit a limit as to the amount of memory you can address, which I doubt the SFC ever, EVER ran into or even approached.

As for Akumajo Dracula (Super Castlevania 4,) here's a sample of what changed, I made it a while back to answer somebody's claim the original had no blood:

http://home.comcast.net/~edoscuro/scv4jap_title_pan.png

Not much really.

I doubt the slowdown in Mode 7 levels is changed for the Japanese version, but I can't tell you with 100% certainty since my copy is sealed, and I've only been able to emulate it :/