I mean look at Andre's record in battle royals. He never lost a battle royal, despite the fact that the entire roster would always gang up on him in these matches.
Not watched the SNME DVD I take it.
This is a kayfabe tournament and kayfabe wise Andre is bigger than the Big Show. This point cannot be disputed without breaking kayfabe, therefore your argument doesn't hold water.
What Sam said. Andre was billed as being bigger. But I can find pictures or matches of Big Show looking considerably bigger in matches against Hogan than Andre did.
Now either Andre isn't that Big or they're saying that Big Show & Hogan aren't as tall as they actually are. I find it hard to believe that they'd have a wrestler called Giant or Hulk and they actually state that they're smaller than they are.