Bullet question, please help solve an argument?

Is a .60 caliber Musket ball better than a .50 BMG? a friend told me it was, but my reasoning is the .60 has no pointed end, thus preventing it from being Armor Piercing/Anti Material, so I figured I'd come here and ask to either prove me wrong, or prove him wrong. I used Google for asking this question already, nothing showed up to me..