I'd roll with GGG. Pavlik only had a right hand and he couldn't move a lick. His feet were cemented to the floor (that it why Hopkins schooled the living crap out of him). GGG's balance and footwork are underrated here, he doesn't need to set his feet to punch. Pavlik would land some shots but I think he would also be getting outlanded probably 2:1. Bodyshots would slow him down and he might even get stopped late.
He could punch, sure. What are the opponents Miranda knocked out that you feel Golovkin would take to a decision?
Golovkin would probably KO the same string of Tomato Cans that Miranda did @ 160. The point is some other poster was trying to argue that Golovkin hits harder than Miranda. That is flat out nonsense. Anyone who was following 160 when Miranda was wrecking havoc among the C class there knows this to be the case...
It's not like we have punching power sensors at our disposal either, so this argument is all speculation. Look at Lajuan Simon, Abraham landed huge blows on him and still went 12. Golovkin smoked him in 1. Like I said, it's all speculation & guessing.