Metal 2 Pro and Metal 2 are two of the best BBCOR bats in baseball, but there are some key differences:
The peak BBCOR rating of Metal 2 Pro is higher, sometimes even reaching the legal limit of .50 in the sweet spot.
Metal 2 Pro also has a better overall barrel compression rating. More barrel compression means more pop. More pop means more hits.
Since Metal 2 Pro is made using higher quality materials, it's also slightly stronger and more durable compared to Metal 2.