We also own 2.6 and a 3.0 Motor.
The 3.0 Motor doesn?t run ass smooth as the 2.6 does, PLUS it isn?t really faster !!!
I also own a Loctite SpecialEd-Bit, with the 2.6 and the blue gears(8,.:1).
It has more torque, runs very smooth, battery lives longer, and it?s (maybe) faster then my friends Impreza with 3.0motor and orange gears (9,..:1)