I've got both.

A .1 with big bores and garodisc slipper

and

A .2 with Avid chassis

and the .2 w/avid chassis is the better car by a long shot on every track i've had both of them on. So far 95% of the people I've talked to that also run the AVID chassis, agree. That last 5% seem to be people who race at TRCR.