Might as well get the newly released Park BBT-69.3. It allows you to use it with the (also) new Park BBT-RS Bottom Bracket Tool Retaining System.

BBT-69.3
Pros:
- all aluminum, so it doesn't mar the BB's external surfaces (more relevant if BB is colour anodized).
- 3/8" square drive for rachets, torque wrenches, and breaker bars

Cons:
- if you use a breaker bar, the stress will make the square 3/8" aluminum hole into a non-square hole

BBT-9
Pros:
- steel, so wears well
Cons:
- since it doesn't cup over the entire BB, easier to slip and mar the bike frame
- relatively short lever handle
- can't use a breaker bar or torque wrench

I had both; sold both and now use the Cyclus Snap.in system. But then I run a shop; for most people the BBT-69.3 is fine (or get a BBT-69.2 cheap from someone upgrading to a BBT-69.3)