Bodybuilders ARE strong… they are weak only when in contest because to show vasculsarity straite muscles etc. they dehydrate themselves to the max, cut the fats and carbohydrates and so for a week they have not the energy to fuel their muscles.
Pornstar mostly have to appear good (but not necessarely as there are many pornstar that are not ever at the max of their shape) so I don't think is the strenght their most important feature...
