RE: A quick question
I would think they would both find it equally easy. Say that two people are benching, one at 135lb and the other at 300lb with the same amount of reps. I think they would both have the same difficulty completing the reps, even though they're different weights. One person is just stronger than the other.
So I think the answer would be that guy a is stronger, but they are working equally hard.
But from a calorie perspective, guy a is exerting more energy since he is moving a larger weight for the same amount of reps as guy b
240lbs @ 13% bf
Squats -- 475lbs
Deadlifts -- Romanian DL (only ones I can do with an injured back) -- 150lbs dumbells
Bench -- 325lbs