User blog comment:Thornclaw Braveheart/Gandalf the White vs. Albus Percival Wulfric Brian Dumbledore/@comment-1017446-20111211220855

I think this is fairly obvious, Gandalf is obviously the better wizard in terms of warfare. Dumbledore isn't the type of guy who would hesitate in killing another human/wizard. Gandalf also has better powers that have greater area effect.