@terry2012: Pretty sure Karas takes the win. He can transform, fly, and he's more durable than Masane. And I forgot how, but he was shot up bad at the end of the final movie and came back good as new somehow.
Masane by the end had the power to destroy a city. However, it matters little. Karas can phase-shift which essentially makes him close to lightspeed. Which is why everything seems to explode or be destroyed at the same time once a battle is over because it all occurred almost instantaneously.
Karas wins if for nothing else than because he is vastly superior to Masane in speed due to that ability.
He carries the Heart of the City with him though, so it wouldn't matter if he left, he would retain his abilities. The Heart of the City isn't the City itself, but those that live there. As such, so long as the people live, the City's Heart will endure.
Witchblade... wins here. The Witchblade will definitely enjoy this fight but I see her winning this one out but will relish every minute it draws blood from its enemy. Remember when Masane got the witchblade for the first time...the Witchblade leveled Tokyo to the ground.