If those are your only 2 choices stay with the power commander it has a lot more adjustment points than the race tuner!
Be Safe
THE DAWG
Sorry Dawg, you're incorrect. The Powercommander only does fuel, spark and acceleration fuel (if it's a USB version) Also, it does spark by tricking the ecm on the MAP read which in turn affects your fuel.
The Tuner does fuel (in more ways than one), spark (without affecting VE), accel fuel, decel fuel, Warmup fuel, cranking fuel, rev limit, monitors all data values, resets codes, estimates hp and tq. Unfortunately people who don't understand VE and just start changing the SERT Air Fuel request usually trash talk it because they don't get the results they want when in reality they do not understand the product (not saying this is you - just pointing out thet the SERT is SUPERIOR when it comes to what it can do.
I see the mistakes all the time - people change pipes and think that when they type in 13.8 : 1 in the SERT Air Fuel request table that they get it. They don't understand the principles behind the product.