I have friends that always say that the only reason why I'm more efficient at bodyweight exercises (pull-ups, muscle-ups, handstand push-ups) is because I weigh less than them. As a matter of fact, most of them are really strong but the can't do a single muscle-up or a handstand push-up, while I can bust them out with ease. But when it comes to lifting weights, they boast how strong they are in comparison to me. For example, I can clean and jerk 235, but one of my friends can clean and jerk 285. Is that really that much of a difference when I weigh 155 compared to his 205? How do you compare strength when you factor in size?