Which is better for a group, War of the Burning or Zelgeist

Am looking at trying my hand at dming for a group that hasn't played d&d before. I already own War of the Burning Sky and I'm planning on picking up Zelgeist on the near future. Anyone have any thoughts on which one might be more new player friendly?

I'm planning on using Pathfinder as the system, and am thinking about using spheres of power/might over traditional casting.