hand vs power compactor

Does a hand compactor (tamper) do as good/better/worse a job than a power compactor?

I could rent a small loader and a compactor to do a small garage project but then I could do it by hand and get the exercise. Our local building materials suppliers go on vacation leaving noone in the store during the summer months (go figure) so I might as well take advantage of the time and get some honest exercise. But, am I doing as good a job as if I hand a power compactor?

Allthunbs