Not very sure about the 416, but to me, the motor position seems to be around the centre of the chassis, while the 416 is near the rear.
Also, it is the love for the TA05 that ppl actually hop it up alot.
TA05 has been popular since it has been out, since 2006, be it in the drift or touring world, so i suppose people actually spend more money to hop it up, its like seeing a child grow, giving it the best of everything.
My 2 cents.
