It's potentially a bigger difference than that. I'm 6'2", 190 lbs. My 11 year old son is 5'4" and weighs about 110. That's less of a difference than Conner to Thor. And my son has strictly no chance against me in a fight, even if I'm trying not to hurt him. If we wrestle or box or go mixed, he can go all out, and I have to restrain 95% to not hospitalize him. Obviously, my son is not Conner in skill, and I'm much more skilled than Thor, but the physical difference tells basically all here.