from the actual racing standpoint- everything i've read says that the MCD will out-corner the FG and Harm due to the AWD, (more controlable slide)but that's a double edged sword.
the AWD is also more weight, moving parts, rotating mass,... etc to get going, so off the line the FG is faster with acceleration.
the slide of the MCD is like the car walking sideways with corections from the steering and throttle to control direction and velocity. you can control the andle of the car and the amount it slide with the throttle. 'throttle steering' - google it.
the 2wd cars swing more when they start to slide, thus a countersteer and throttle adjustment must be made faster to catch the car before it spins out. i say adjustment becuase depending on what you as the driver did to induce the spin, you must do the opposite or half the opposite to fix it.
ALSO - MCD or any AWD cars are not allowed to be admitted to sanctioned races with 2wd cars. different classes. if you're into just bashing around with your friends, than that makes no difference, but if you want to race you'll have to conform and choose your class before you go buying a car, and parts.
ad-hock races are a different story. if you go to a track with a bunch of different people and just have open lapping sessions, then you can choose either.
in short - the "racing" aspect is what will help make your decision. it's difficult to compare the AWD to the 2WD...
I hope that helps,
Brian
