The bodyweight thing is a tricky scale. The lighter you are the easier it is to get 2xBW. Big Gene Rychlak benched 1005lbs but that still isn't 3xBW. Whereas the guy in the 165's who got 615 is approaching 4xBW. Who is stronger well Gene lifts a lot more so I say he is. Just like people who weigh less than me and tell me they're stronger because they can do more pullups. My response is always "Let's strap 100lbs to you so we weigh the same and see who does more"
Cheers,
Scotsman