My opinion is biased.
But, both the Commander and TurboTweak chips are very capable and will most likely run the same in your car. One notable difference is that on the TurboTweak chips, the idle is open loop by default, where in the Commander it is a feature that the user enables.
This bulletin board can provide you with a ton of feedback, so browse around, and do a few searches when the search function gets fixed.
Bob