Cybren

The one that broutht the gun? You really can't say outright one would win against another. A fight is largely a random thing, and really isn't something you can say outright "this will happen", or "He will do this", or "This always win, so it will win again"

I doubt it would be easy to grapple someone huge. Alot of the locks would work, but its harder to get into them. As for striking, its said obese people have a higher pain tolerance, and from experiance, that's true..