MOTW. I received KOF2000 three days after I'd received MOTW (from Shawn!), and haven't played it much. KOF might have deeper gameplay, but MOTW just feels better. It just feels better to control a Garou character, they feel heavier or something. KOF2000 also has a rushed look to it; most backgrounds suck, yes even the one in the desert. Compare that one to Gato's stage, or Terry's!
MOTW might have been $200 more, but is worth every last cent.