The XCal 2 is made by SCT, which spun off of Superchips. It is more versatile than the Superchips Max Microtuner with respect to tuning in that it accepts custom tunes. It also will perform datalogging, which the Microtuner will not. The Superchips Microtuner is simple to use, and does allow the user to make changes to automatic transmission shift points/pressure, turn T/C on/off, lower fan on/off settings, raise speed limiter, and adjust the speedometer for gear ratio changes.