NOTE THIS: Sephiroth is only a upgraded human with a overly large sword
Dante is a half demon with many weapons,trick,transformations and many ways of kicking Sephs ass
Here a little list of times Dante have taken major damage
DMC1: Dante gets pierced with a sword (larger than Sephs)threw his heart and spine.
DMC2:crap game i dont wanna remember.
DMC3:Virgil stabbs Dante in his stomach with a Seph type weapon, yet he survives with no problem digesting
Ps: Seph would NEVER survive anything of this, so he can just go back to being a labrat or whatever.
Ps: I have completed both games so I know im right
Ps: Dante could beat him without Devil trigger or any of his guns
Dante plus Seph=dead human