The size difference creates a much bigger punching power differential. Rigo wasn’t able to keep Loma off of him because he just didn’t have the power. If they were the same weight, those punches would have been much more effective and made Loma think twice before coming in.

The other side of it is that Loma could pressure him much easier and hurt him easier. It is also harder to keep someone off of you who is bigger. The first round I think showed how the fight would have more looked like without a size advantage.