That guy also doing the test also called...The 370Z a "Proper Muscle Car"...
Using Starting prices(Where they start in basic form) and Fully Built prices(Fitted with Every option)
RCZR €41,500 €49,470
Nismo 370Z €44,900 €47,835
S3 €39,200 €50,320
A45 €49,680 More then all
RCZR £31,995 £52,005
Nismo 370Z £36,995 £50,850
S3 £29,820 £50,645
A45 £37,340 £52,785
So the 370 is cheaper with every option then the RC, But not in basic form in Germany, In UK its the same scenerio, Not sure bout everywhere though.
And the A45 is a mere £785.00 "More" then a RCZ Fully Built in the UK. The S3 is cheaper in basic and Fully Built form here, But €900.00 more fully built.
And the RCZR is 667Lbs Lighter then the 370 despite the 70Bhp difference. Lighter then all by a Huge margin infact.
As for it track performance, Out of the cars I listed, The RCZ will beat 4, It has the same performance as 4, And will get killed by 2, So no not really. So its only cheaper in the most basic of its form then 3, And fully done its more expensive then "All" but 2 that I listed. Great car, But I think id rather go with the other options I listed, Or atleast Most.