Per the article below:
Base/Z51: 6.2L LT2: 495 hp
Grand Sport: 6.2L LT2 + hybrid: 600 hp
Z06: NA DOHC flat plane crank (maybe 5.5L): 650 hp
ZR1: Supercharged DOHC flat plane crank (maybe 5.5L) 850 hp
Zora: Supercharged DOHC flat plane crank (maybe 5.5L) + hybrid: 1000 hp
Sounds amazing to me, Z06 needs a stick tho.