Some tigers are not as big as lions but generally the biggest lions are not as big as the biggest lions, but there are some very big lions with very big heads.
Most of the lions mass is toward the front. The back legs can run and keep up with the front but they are more forward driven and you can see sometimes the back legs are pulled along and just hop almost like sawhorses. Lions have shorter bodies but the limbs often look longer than a tiger with a longer body. Tigers have more of an wheel drive and can twist their bodies better and never really give their full back. The musculature of the tiger may appear more sleek because there is probably more mind muscle connection when moving and prowling. The bigger size muscles may not mean so much. Lions fight more and have more scar tissue on average since tigers are mainly solitary and kill by pouncing.
Lions exploit the weakness of the low back of other lions. Lions tend to ignore this area in defense. The back legs are useful and lions can pedal them like cycle and rake their rear claws. Even though a lion may have smaller limb circumference and smaller paws and a larger body circumference you can see the sometimes the limbs are really thick with dense connective tissue and the bones are dense.
I think bite force numbers are off because lions are wise not to break a tooth as stupidly as a hyena would.