I think i posted it, the Arcade version of TNMT you could've play at 4 players, it was a big Arcade machine : i don't know if it's possible with the snes add-on to play with 4 players...
Otherwhise, about Mortal Kombat, the thing is i played all in Arcade before it was out the 1st i discovered it on an Arcade + Casino place.
The 2 months before but not too much i remember (perhaps a year for some, like Street Fighter II, but many games i played on fairground, they stayed 15 days every 4 months, with at least 4 "caravan" plenty of Arcade cabinet)
The 3, never really played, i think i gotten a PS1 at that time and sold my Snes, like for many games on 1995-96 etc. i played at friends house.
But the conversion wasn't that good in comparison to MK II. And more than all, aswell as MK1 was a basic game more a "concept" than a game with a solid gameplay, the II transformed it. Also more fun and 90's vibes, Friendship, Babality, 3 stages Fatality, 2 Fatalities by personnage...
One game i played a lot with a friend, was that one, it looks like a melting pot but it was total fun
Mortal Kombat Trilogy, with the "One Button fatality" 😁
Simple to do, Hold Up L1/R1/L2/R2/ on "option".
MORTAL KOMBAT TRILOGY PS1
No joke, that was the game i played the most since i got my Raspberry with Recalbox on PS1 lol.
After that it became bad until the 9 who was a remake of the 1/2/3 (4 on MK 10, but with different characters)
Another game that was confusing for player :
SAMURAI SHODOWN
Snes vs Megadrive.
Megadrive Version
Pro: bigger sprite, like arcade
Blood (or it's on Sega CD only > but that one don't have the referee who trow you stuffs like bomb, apple etc.)
Overall looking much more close to the arcade (Important Pro > why people preferred it that snes)
Con:
no de-zoom, like in the arcade, so area restricted.
Some missing move important, like the big sword attack from Haomaru got the similar move as when he's crouched and gives a big sword attack...
No "Earthquake" character (neither on Sega CD)
Snes Version
Pro: all players got all moves
The full area is playable, with option to de-zoom
Colors were pretty well represented
Earthquakes
Con
Big con > way too small sprites (they should have found a compromise with average sprite even with less area "explorable")
Also the screen was globally smaller, as Megadrive got a bigger resolution.
You feel like a port, even if gameplay and details in graphisms were close to the arcade, the feeling was less.
Pro and Con : Sound and musics were good, but some were reworked and not looking like the original
Conclusion: you feel more like you play the real thing on Megadrive. Even with less color and the area "locked", and Earthquakes was too big for the roster.
No one played against him, but his stage is awesome graphically.
Gameplay in Snes was more like the arcade, but not the visual and feeling. Sad. So Megadrive or Mega-CD (with all animations and better colors, but no referee whatever) wins to me. Cooler to play on Sega. But still super fun on Snes. Personnally, right now, i play on Snes only.
ART OF FIGHTING SNES
NOTE about Zoom/De-Zoom : Art of Fighting on Snes got Zoom/Dezoom on this game and they got big enough sprites, the port was very good, like Fatal Fury 1 and 2 Special (practically identical in every moves to the Neo Geo). BTW the 2 is to forgot, that's why they made a "special" on NEO GEO.
Issue we got in Europe : the game was 50 FPS instead of 60 FPS.... So slower

One pro on Megadrive : i think the scenes between and talking were similar to the arcade without censure. Or something like that.
FATAL FURY 1 SNES (i think the same here with zoom didn't watched, i remember)
FATAL FURY SPECIAL (Fatal Fury 2 revamped) SNES (same here with zoom like i've mentionned above)
On Megadrive not, and special moves way easier to do (not like in arcade, snes was closer to it) and also important for gameplay: on the first, there's no button to jump on the background, so less attack opportunities. But MEGA-CD Fatal Fury special and Snes version are both super good. With better sound on CD of course.