Well we all know Khan would give Hearns a run for his money at 154 and even though 3G is a small middleweight,his power would have no effect on a granite chin(providing he could hit it,we all know Amir taught Herol Graham everything he knew about head movement) like Amir's.
I expect to hear Khan fans telling us how 3G would struggle with Khans handspeed, as this is the only argument they can ever make for a Khan win :rofl