I would guess he means George was the most "heavy handed" guy he ever fought, which was probably true for most who fought Foreman. George had freaky power behind shots that weren't even fully turned over, didn't catch guys off guard or land in a great spot. I don't doubt Foreman was a stronger or more powerful man than any of those 3 either, but it always makes me chuckle when a fighter says a guy that didn't knock him out(or especially even hurt them to badly) definitely hit harder than a guy who did. As if when Evander peeled himself off the floor in the third fight with Bowe, his first thoughts were "at least he didn't hit as hard as Foreman"