Nothing comes close to affecting the sound of an amp as much as the speaker does.
I recall those days of the 1960s, 20% parts, and you could line up a number of new same model amps and play them, and they would each have their own sound. You could pick one you liked best. Or you might buy the one in the store and find a buddy had one that sounded better. And the only difference would be the tolerances of the parts.