Vergil wasn't even evil, he just wanted his suffering to end, he suffered a lot more than Dante, even though the exact same thing happened to them both. all that Vergil wants is his family back, & because he could never have it, he just sought power. & of course they both had very strong brotherly love, they just won't admit it.
Vergil's story is more tragic, if you think about his life, he suffered for more than 20 years, 10 years mourning the loss of his mother, & 10 years being forced to do Mundus's bidding. Dante got over it evantually, but Vergil seemed like no matter how long he was gonna live, he'll never get over what happened. they both loved their mother a very great deal, but Vergil still showed he'd do anything to get her, even if it means destroying the whole planet, Dante is the type to look at the "bigger picture" & decide to move on.