You can find the same videos about R35s or most cars of any note for that matter.
The two ZR1s on Carsales are $200k with basically delivery / demo kays. The last review I watched of one was comparing to a Ferrari and McLaren.
R35s seem to vary from $115k for a 2009 model, to $185+ for a brand new one. A brand new ZL1 Camaro converted and ready to go is $160k. In the US I believe that the R35 is in between ZL1 and ZR1 in terms of pricing. When you look at those prices, the GTS starts to look like a relative bargain!
I personally am not interested in comparing it to the A45, but you can compare it to anything you like really.