ZR1 > ZL1
Z06 > ?? maybe Z/28
GS > 1LE
C6 > SS
In the other hand, while there will be no Z06 for 2014, the produced engines from LS7 line need to go somewhere. I think the LS7 Camaro will be limited for ONE year production while they design a replacement for LS7.
Also I think the ZL1 was planned to be Z/28 powered by LS7 but they dropped this plane and went For LSA instead at the last moment and call it ZL1. Why, maybe they faced some technical issues to get the LS7 working with automatic transmission. Or a study showed they cannot provide as much LS7 engines for the highly demanded Z/28.