http://www.motortrend.com/news/2016-che ... 11-gt3-rs/
Well these are very high performing cars and unlike what's going on in more pedestrian segments, these are NOT at all alike. Different everything. They handle different, feel different, sound different, N/A V10 vs F/I V8 vs N/A H6.
Z06 was the cheapest and actually a somewhat normal car. It is one step down from full track kill that the ACR and GT3 RS are.
Braking performance from 60 mph on the cars runs from under 100 feet to significantly under 100 feet. Crazy.
The Z06 did not appear to have any of the early teething issues that some LT4s have experienced. Reports are they have sorted that out. Frankly I think the Z06 kind of got the BMW treatment in order to sell more. I think there is room in the Corvette stable for a higher performance, more focused variant. Yeah it was slightly faster around the track than the $203k GT3 RS, but the ACR was WAY faster than both of them.
The ACR, however, remains a torture chamber so it depends what kind of experience you are looking for. A street car with occasional track duty or a 100% track toy. As a track toy, the ACR seems unparalleled. For something you'd actually want to drive to work or even to a nice restaurant with the wife (and still know that you can dispatch a GT3 RS on the track), the Z06 is the obvious choice and it is an absolute bargain for what you get.
As for the GT3 RS, Pobst spun it not one, not two but THREE times. Which is three times more than he has spun anything while hot lapping MRLS.