Originally Posted by
feioncastor
No, because Sephiroth had a strong attatchment to parental figures, so he wouldn't have killed Gestahl because Gestahl had been like a father to Kefka. He would've given him a planet or something, or like, tried to reunite him with a bunch of hooded guys with tatoos, at which point, Gestahl would have just been all like, "Dude, knock it off.", and Sephiroth would've been all like, "Father, don't be angry at me or they might make a straight to DVD feature film involving some guy who turns into me and I'll have a brother who cries all the time despite being a fully grown man."
The way I see it, Sephiroth was insane, but still wanted to do what was right. He was doing what he genuinely believed in his messed up head. He was trying to fix things and make everything right.
Kefka was doing what he thought was wrong. He was killing just to kill. He suceeded in drowing the planet in a sea of explosions, killing most of the people and even sinking the item shop in Mobliz about 73.8% underwater, cutting off all access to the local Dried Meat market. Kefka's wraith unleashed like 10 legendary beasts that are all mega-powerful (unless you've mastered Shoat and Phantom). Kefka made it so that traveling by Chocobo is really impractical because instead of having two main continents, the world was now made up of like 47 continents.
Dancing Mad > One Winged Angel
But you already knew that.