Audi R8 vs Audi RS4

Audi R8 Price: $110,000+ Horsepower:420 bhp @ 7800 rpm Torque:317 lb-ft @ 3500 rpm Max RPM:8250 rpm 0-60 mph:4.5 sec Audi RS4 Price: $66,000 Horsepower:420 bhp Torque:317 lb-ft @ 2250 rpm Max RPM:8250 rpm Which car would you prefer? Do you think the R8 is worth the projected price?