PCV has better tuning resolution. 250rpm increments versus the Bazzaz 500rpm
Bazzaz has a better quick shifter, and you have to buy additional parts for the QS on the PCV.
Bazzaz has control for both sets of injectors. Not needed, but great to have if you ever plan on doing engine work, nitrous, or turbo etc.
PCV is smaller
Both will get you the results you want.