Pros: This is the baseball you need if you are playing in tournament play or All Stars. The leather is the same, but it has a cork and rubber core. The DLL-1 has an all wool core, so it gets softer faster. This is the better of the two Little League baseballs, but costs a little more.
Pros: These are way better balls than the slightly less expensive wood center balls (the wood center balls split open a lot more frequently - a LOT more frequently).