The original the classic Mortal Kombat. Personally I feel the music and sound of the sega genesis  was far superior to that of the snes version, however the graphical quality of the snes was far better and already had its sights on the future. The blood was A big deal in those days I remember the news outcry to ban this game.. lol seems funny now. As far as overall comparisons go I have to give mortal kombat 1 to the sega just for the simple fact that they used blood and snes didn't. Eventually the snes had to follow suit or they would have been left behind, the snes version was A much more fun game for some reason even though they are almost identical. So if you were from this era of gaming or before it,   (im from 87-90's gaming nes-snes-sega-sega cd-n64 era)  you have to appreciate what mortal kombat was going for, not just a fighting game but a leap forward in the freedom of game studios to creatively think of new and fun ways to raise the bar.  I will always have a special place for mortal kombat 1 in my game collection, but if your A new player just playing this game for the first time (I dont see how thats possible) if playing the sega version just hit that abacabb blood code at the story screen and let the good times roll.. Well for at least A couple hours : )