User blog comment:DeathBattleDude/Vergil VS Sephiroth Analysis/@comment-3035019-20160722130939/@comment-28868284-20160722134730

sephiroth has to switch 2 styles due to his enormously long sword, which gives him a disadvantage, cloud was able to get up close to sephiroth with ease, he may be the strongest soldier, but that does not mean that he is not the best swordsman in the Shinra company. Vergil is much more stragetic and cool, having the perfect length for a katana.

Yes, Masamune is just as impressive as a Devil Arm, but since it wasn't forged by Sparda, it isn't a Devil Arm, so Vergil would destroy the Masamune just by slicing it. Vergil can destroy a Devil Arm, but it will take more than a few seconds but less than around 2-3 minutes due to Sparda's skills in forging weapons like Rebellion, and Ebony, and Ivory. Even if he did mix it with Materia, it will never get around Vergil's "cut through anything sword". Of course pitting a sword that can cut through nearly everything against another sword that can cut through anything is a mismatch, because a nearly cannot match Yamato.

Sephiroth's Bizarro and Safer forms are quite powerful, but it needs a source of lifestream, Dark Materia and he can only transform as it once. Lifestream, is outside help. Just imagine a swordless Sephiroth against Zack, he'd be murdered immediately.

Yes, Vergil is continental, for he is stronger than Abigail as he created a portal that involved a portion of the Earth, comparable to Dante, and probably equaled Argosax.

I've done lots of research, and i'm not kidding around when it comes to things like these.

So at the end of the day, If Masamune breaks, Sephiroth will be weakened for half his spells are often placed on Masamune. If Vergil turns Devil Trigger, he'd overkill Sephiroth.