I have both of these cars and it looks like the CG on the A800 is even lower than the 4X's. I love how both have done away with the shock towers.

Each car is completely different too. I would argue that the A800 is a MUCH more conventional car than the 4X in terms of build and setup. I've not had any track time with my A800 yet so can't comment on performance comparison but I'll say I like my 4X more than my T4 and Xpress XQ1 on and off track!