Lifting weights heavily depend on the type of person lifting. When a person squats, part of the motion forms a circle. The longer your legs are the larger the radius of this circle will be formed. When Jake DeMersman squats with his short stubby legs, he doesn't have to produce as much force as a longer legged person like myself. torque is proportional to the radius of the circle. Therefor when Jake squats, less torque is pulling up on him when he pushes back up on a squat. Also in terms of potential energy, Energy is proportional to the height of a certain mass. Therefore when i literally have to bring the weight a longer distance, a greater change in energy is required. When i squat there is a greater torque and more energy is required. Jake may squat more than me yet this may not be the best test of strength in legs.