I agree it does slightly resemble Sandoval's style, but Buffagni's is a little less "cartoon".
Sandoval's art is kind of a hit and miss for me. I like some of his work like when he can do holograms and character designs but when he draws hair and facial expressions it's really awkward to look at. An artist that I really want for the Ultimates is Salvador Larroca. He did the artwork for the Children and Reed Richards scene in Ultimate Fallout but he was never used as an artist again. Put him on the Ultimates with Edmondson!
He is as good as Esad Ribic.
I'm loving this book. It hasn't been amazing yet, but it's a good bit of fun, and Edmondson's Tony is great. I want to throw in my vote for him to take over Ultimates. Though, while I think Buffagni's killing it on this book, I don't think I'd want him on Ultimates.
I will, however, nominate Edmondson/Buffagni as the team to launch a new Ultimate Fantastic Four!!! Sandoval would also be a great (really, an even better) pick.
This would make me extremely happy. Tony could even fill in for Reed. Mar-Vell has to be involved as well.