What are the differences between ash and maple bats?

Here is a good summary of both Bat Types

Hard Rock Maple-

Maple bats have become very popular over the past ten years. After Barry Bonds broke the single season home run record with one many players switched to the hard wood to swing with. Unlike ash Maple bats have very little flex but pack a lot of pop. Maple bats are heavier if not turned correctly but are great for training bats as well as a long term bat.

Traditional Ash-

I call it "traditional" because bats have been made with ash since Baseball began in the early 1900's. There is nothing like the feeling of swinging an unfinished ash bat. Ash is unlike any other wood bat in the way that the bat flexes when it hits the ball, letting the ball carry further. Ash bats are great but lack the strength of other harder woods. But if you hit with any wood bat correctly it will last you a ton of at-bats.