I'm not a fitness nerd by any means, but it's worth mentioning that your bodys ability to get oxygen to you muscle can reportedly easily become your bottleneck if you're training too once-sidedly or use performance enhancing drugs/steroids.

So the bulkier person could theoretically perform better, but doesn't in practice because their body isn't able to actually utilize the muscle effectively.

That's why farmers often outperform lifters outside of the exact niche the lifter trained