I'm neither a FF6 nor FF7 "Fanboy" but I must concede to Kefka's superiority. He was a better villian IMO. I love both 7 and 6. Sephiroth is by far the second best FF boss to date. Garland, Ex-Death,Kuja, Edea, Sin etc... got nothing on these 2.

Kefka is just more evil. He's more purely insane than Sephiroth was. Seph was obsessed with a maniacal plot whereas Kefka just liked to kill things and be evil as possible.

Here's what my definiton of fanboy is - An individual who blindly defends his/her favorite game without thinking or weighing the situation on hand.