I ran my z on both dynos just for this reason and #'s were very close. If your worried about #'s on dynos than you really need to be more educated on what there purpose is. Its a tunning device. And tiobe honest, S&R's dyno is a better dyno for tunning than Z1's.
S and R dyno
Z1's Dyno
sent from my SAMSUNG- SINGLE TURBO SGH-1717