Both are around the same height, GGG is very skilled, if hypothetically he bulked up to 175-180lb how would it go for 12 rounds? GGG is nasty, left hook to the body, left uppercut and Joe is in trouble :bbb
I would like to see GGG in HW. He has the same height as Mike Tyson, but a longer reach. He is harder hitting than many Heavyweights, imagine him bulking up. His style though is not too explosive, what you need with this height. His style is good for 154 - 168, but it will be hard agaisnt the bigger ones. Anyway, it will be enough for Frazier. These old fighters are the same level of Jason Gavern or Brian Minto these days and GGG would eat both of them for breakfast.
