Joe and pete are at the batting range and find out that joe can hit the ball much farther than pete. based on this information, what might we conclude?

We might conclude that Joe is more Muscular.

If we're talking about the amount of the hits , it simply come down to technique and concentration.

But if we're talking about distance ( especially if there is a huge difference) It's very likely that it because of the difference in strength. All professional baseball player have a solid upperbody and core strength