Well, I have the Diablo Predator and a Steeda CAI...myromac87 said:
It is easy to use and you can download tuning updates from your computer with the addition if the proper cable and power transformer...
This tuner will allow you to adjust many different engine variables as well as the shift pressures, if you have an automatic...
If you're a gear head and want really twik your engine, most guys are using the X-Cal which is a little more expert oriented for my taste...
All in all, both are good units but it comes down to a matter of function...
Good Luck, Dave