I know many of you say that new Vergils personality is basically the same as old Vergils. But I really have to disagree on that one.
First off, old Vergil's attainment of power is based on him actually gaining raw power to fight with, where as new Vergil just seems to have the Order, A completely different type of power. Wanting this type of power instead of raw power is very different and does require quite a different type of personality.
Second is the whole goals being the same in DmC and different in DMC3 making him the enemy. Yes that is true, but the fact that new Vergil's goal is the eradication of Demons, it's completely different from old Vergil, who just killed what got in his way at that point in time, and didn't care less for the life of anyone else. Again very different personality gap between these two styles. Plus in DMC3 if Dante had the same goal as Vergil, Vergil would have just done what he did to Arkham. And if Vergil had Dante's goal, he just wouldn't be Vergil quite simply.
Even if it turns out he was going for raw power, or in the end is willing to let everyone die, it still doesn't change the fact that the method to get there is very much different from what old Vergil would be doing. Since old Vergil is very open about his goal from the start. He doesn't seem like the type to hide behind a completely false identity as extreme as the leader of an order to solely kill off all demons and protect humans.
Now open to replies, but go easy on the opinions against. I've been quite sleepy whilst writing this so I'm expecting a few loopholes and errors in logic