Kingdom Hearts II Sephiroth or Xemnas?

Sephiroth wins.
Look
Twilight Xemnas < Sora + Riku
Sephiroth >> Sora(If you see the cutscenes , he say he was just testing you)
So Sephiroth use like 20% of his power to defeat Sora.
If Riku = Sora
Sephiroth would use 40% of his powr to thest these two.
But these two defeated Xemnas
Resuming
Sephiroth>>>>>>>>>>>Xemnas

 

Maybe.. that's not a bad theory at all... But I honestly think that Sephiroth would have to use much more then 40% of power to defeat Riku and Sora

 

Sephiroth hands down.

About that theory, I think Sephiroth used way more than 20%. Maybe at least 40-60 for Sora alone.

 

Sephiroth will kill Xemnas. Warping, power, Descend Heartless Angel, sword swipes, knocking people around.

While Xemnas just has those dark and light streamers of his, with his aerial blades that don't REALLY hurt. (He is a bad final boss. Xehanort Heartless was harder.)

Really, I don't see why people ask this question. XEMNAS NO DUH! Naw, j/k. Sephy will kill Xemmy in like... two seconds.