As somebody that age when both were coming up (Im 31 now), Wiz was a far, far bigger artist. I think because Wiz got so big at one point, in peoples mind its like he fell off popularity wise (which he did, but not off the map.) Mac, nationally, originally had some marketing budget off of Wiz success on Rodstrum and like others say, it was high school/college white buzz that broke him through with Best Day Ever (okay) and Blue slide Park (not good.) Then he kept getting better, putting good music out, and he built a loyal following. But yes, simply Wiz was always and still is bigger.
In terms of the talk with beef, I will say I had met Wiz twice back in 09-10, once just after partying at U of Pitt at the O, and dude might have been one of the nicest celebrities I have met...Just a dude who was so chill and didnt have a care in the world, which my friends that were in the scene at that time while at Pitt said, (it was crazy too because this was when Deal or No Deal was coming out and I along with my friends were the only people who knew it was him) Just seems like a guy who is at peace with everything, and I doubt he has room for really any hate in his heart for anyone