XR6 quicker 0-100 on the street, F6 faster at the drags where it can get traction. I have an FG F6 and find that it cant get the power down. First gear is useless on the street, with traction control on it spins the tires then short shifts into 2nd loosing time. Traction control off and it justs spins the tires constantly. 245 tires are too small for the torque.