The JB3 has come a long way since the first versions, just as the Procede has. I just feel that the Procede is more complete as a tuning solution. On this level of car, it is worth it to me to spend a little more for that. The Procede gives you code reading, knock monitoring, and control over wastegate, ignition, boost, etc. In comparison, the JB is turning up the boost and requiring the ECU to vary everything else correctly.

I also like the safety features available with the Procede. All of that gives me a little extra sense of security when adding aftermarket parts to my car.