Because the two are so different it what affects their use and how they earn perks and how learning them works that a direct comparison produces predominantly false data. Basing any position on false data produces bad results.
I was hoping you were going to give me some of those 'lots of things' you had in mind. It's hard to have a discussion when someone is repeating the same thing.
Edit - Just to be clear, I really have no idea what makes the GV game so vastly different in regards to perks and ENY. I'd really like to know what I don't know.