There was really no reason for this. They should have just learned from their mistakes in MK3 and put it in MK4.
The graphics have improve a small bit. The character models do look more smooth and the environments (even though they are still plain).
The multiplayer is much better now because of the added modes.
The difficulty is slightly eaiser but you'll still find that the computer will beat you up quite easily.
The famous "Whoever Wins" at the end of the fight is gone!
I still feel this was a pointless game to make and they just should of put the stuff they wanted in MK4. Anyways, if you want MK3 get this instead. UMK3 is really good for multiplayer, so if you want a game that you can have mutiplayer fun with, this would be a good choice.