I would be tempted to give Bruce greater stamina but Andre at a comparable age could keep a match going quite a while. I'd also give him potentially more pain endurance in that, like most wrestlers, he had a number of times gotten broken fingers (real, not kayfabe) and kept right on with the match. We don't have any recorded injuries for Bruce because we have no proven real fights.
Also, in "Little Dragon", the big budget movie alleging to be a biography, he was temporarily paralyzed from a sneak attack kick to the spine. In reality, he hurt his spine lifting weights that were way to heavy for him and was never paralyzed. But, for millions of people, the myth is fact.
Not that Andre doesn't have his folk tales but the ones people actually believe are mild compared to Bruce's. Nobody with a brain seriously believes Andre deadlifted a ton or broke a steel pipe. They do believe he turned over a car using weight and strength but since the Big Show overturned a much bigger vehicle, that's believable whether or not it really happened. Incidentally, the Big Show feat was slightly stage magic. They let a little air out of the tires on the opposite side so the side he was pushing was slightly higher and the other side slightly lower. But that was as far as it went.