I run the T4'20 and went to it from my A800 i had for a short time. Loved the corner speed of the A800, but hated the maintenance on it. Seemed every run the camber/caster would self adjust, even without hitting anything. But the good thing, it didn't hamper the performance that bad and may just be part of my OCD, lol. The final straw that made me get rid of the A800 for the T4, the plastic a-arm pivot ball covers. When the ones break on the rear close to the motor during a club race, all sorts of profanities come out of my mouth, lol. Both cars are good and can be just as fast as the other, you can't go wrong with either purchase.