Let's compare.
Surt has excellent fire damage. Vulcanus has excellent fire damage. Advantage: Neither.
Surt does not resist fire. Vulcanus does not resist fire. Advantage: Neither(and really guys, the hell is up with this?)
Vulcanus has healing. Scrubby, but healing. Surt does not. Advantage: Vulcanus.
Surt has Might Reinforce to make his attacks stronger. Vulcanus has no such thing. Advantage: Surt.
The extra boost from Might Reinforce is a whole hell of alot more then Vulcanus' scrubby healing. Game: Surt.
Vulcanus might be a pretty powerful angel, but full Gods think twice before picking fights with the lord of the Vanir.
