If you're running a brushless motor, then you'll definitely want the programming ability. It lets you dial down the brakes, because they're FAR too powerful on good brushless systems, which will destroys diff's and drivetrains, as well as flips your vehicle end over end. You can also dial down...
The XTM X Factor is not a crawler. Guys converted them to electric and competed in the Super class at crawler comps.
The X Factor came with the XTM 24.7, which is a 4.02cc motor. The Genesis 7.7 has a 7.7cc motor.
The X-Factor uses the same diffs, ring and pinion as the XTM Mammoth 1/8...