Thinking about it now, I'm gonna have to go with DmC dante if it were DMC3 dante vs DmC dante. And I don't mean the current DmC dante, I mean the Dante from 2010.
While old Dante is half demon half human, he's still only half of a powerful being. Meanwhile 2010 new Dante is two powerful species combined in one body and is actually a tougher guy to handle. While DMC3 Dante is all about trying to look cool and talking on liners all the time, it's only dwindled his actual power from what it should be. Meanwhile, DmC 2010 Dante's been fighting demons all his life and it shows. The way he doesn't mess around, and the way he's stone cold with these demons. He has gained a lot more strength by making the one liners less and his actions more.
So in my opinion, it would go like this.
"LET'S START THE PARTY!!!"
"The f*ck you just say?"
"That's what you get for bein' smart."
"Peace out, bitches!"
*DMC4 Dante comes in to see his past self lying on the ground*
"Imma kill that kid."