My favorite King of fighters cause ive never played XI :)
even though king of fighters isn't the best fighting game and was always in the shadow of The Street Fighter Series it holds its own as a great fighting game.
the graphics on both games aren't that great due to the neo geo hardware being so outdated but this game is all about the gameplay
king of fighters 2002 had the traditional 3 vs 3 single one fight at a time match style where king of fighters 2003 has a different style which is a tag team like Marvel vs Capcom 2, some people don't like the tag team fighting but i like it it brings originality to the 2003 installment of the game. Both games have their own unique fighting style which makes them well unique( wow that made sense)
King of fighters 2002 has a bigger roster then 2003 which makes it a bit more a appealing. The more characters the better right :P . I personally like 2003 better though due to the different fightstyle
as long as it has Iori, K' and Terry in it I'm fine :)
its one hell of a bargain too both of these games for less then 40 bucks thats a steal if you ask me.
the value of both these games is great especially cause of the price
what these two games lack in graphics totally makes up for it in gameplay and value
its a must buy for a fighting game fan