Who is stronger, Cloud or Zack?

[maybee]

Well it seems you're more going for the retconned version of the story and characters anyway. The Cloud in Crisis Core and the rest of the compilation, as maybee points out, is basically not the same character, and if you're going to retcon something I like for the sake of earning some more money, damn straight I'm going to treat it like it's non-canon..

This

Cloud in the Compilation is an irritating pussy. Zack in the Compilation is a bad-ass.

Cloud in the original game is a bad-ass who awakens from a two-week coma and is fighting Carry Armor and hijacking submarines the same day. Zack in the original game is seen getting curbstopmed by Sephiroth and killed by a Shinra soldier.

This again.

Cloud Final Fantasy VII " I'm a bit messed up in the head from the experiments that I've been through, but it's all okay; I'm okay to make Sephiroth pay for what he's done "!

Cloud Advent Children " Nooo Kadaj hit me with a sword... I'm going to sulk and whine... I can't help anybody... I'm useless... Sephiroth scares me Mummy " !

Cloud Dissidia " I am............ a emo "

Zack FF VII " Sephiroth is really awesome and I'm his biggest fan " ! " Oh whoops a Nibelhiem Dragon defeated me, but that's okay " !

Zack Crisis Core " I'm a prideful Solider that can fly within the air like firetucking Superman and I can defeat tons of millions of Wutai Soliders within one hit because I might as well be the Final Fantasy version of Jesus ".