Played MM3 on amiga but didn't finish. Finished it on PC several times. Tbh, 3-xeen is kind of the easy-peasy baby might & magics. Swords is tougher. It'd be hard for me to rate the ease of each game considering platforms vary a little and determining a scale is the issue. Size of game, how fast to complete, difficulty of combats, puzzles, interface and frustration, etc. I would have liked MMX to be untethered from steam & ubi but I say that about all games. If you like achievements and shit then fine, but sometimes that isn't possible so cut the tether.
i don't know if the tbgfx16 one i found is translated or not. I am wondering if there isn't an in-game toggle tbh.
https://www.emulator-zone.com/doc.php/pcengine/
Mednafen eh?