A general principle in biology is that the basic unit of muscle activity
(the sarcomere) is pretty much the same in all animals. That means that
the muscle of any animal is just as powerful as the muscle of any other
animal. What differs between animals is how the sarcomeres are arranged,
and how many of them are dedicated to a particular action. This is a
difference of biomechanics. By way of comparison, you could put a 500
horsepower engine in a race car and in a tractor. The engine in both
vehicles is equally powerful. However, the tractor uses that power to pull
heavy objects but not to go fast, while the race car uses that power to go
fast but it cannot pull much weight. So, the two vehicles are just as
powerful, even though there is no way to compare their performance. Your
human and gorilla comparison would produce a similar result. The two
creatures may be equally powerful, but they are completely unequal in
their abilities.
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