With any wooden bat, aside from the Stacked Handle baseball and softball bats, there is very little difference outside of the grain and weight distribution (the opposite ends in terms of distribution being between top-heavy and even) Big sluggers often, but not always, prefer top heave bats like the Louisville K-55 that Hank Aaron used.
The Majority of what is available to the public in stores is poor quality. The way you can spot it with ash is by the number of grain lines (i.e. - the more grain lines the poorer the quality). The best ash bats are very few grain lines along their length and go to the major leagues, as they get the first picks.
If you want the best wooden bat out though, you should check out
www.stackedhandle.com; they have the only
trulyunique
patented wooden bat. Their bats not only is made out of birch which is a highly competitive wood (good hardness/flexibility ratios), but their handle has all kinds of excellent qualities because of its shape. It engages more muscles in your hand than a regular bat, and helps promote good technique. I hear that they actually perform better than the new BBCOR bats. I wouldn't be surprised if more and more high school baseball players begin choosing them over BBCOR bats to show that they can use wood. Why not? Right? they are both legal...and the Stacked Handle likely have more pop.
anyway. that's all i know.