Yeah from what I have looked up, 6th Gen Camaro SS 1LE and C7 Stingray Z51 are very similar in terms of performance. The Camaro may just lag a touch behind, but not by much.
Other than performance, I think the difference between the two boils down to these:
Corvette: bigger cargo space, better fuel economy(I know not a lot of people care, but still), lighter, targa top, more luxury look and feel
Camaro: rear seats, better manual transmission(I heard the C7 7-speed feels a bit off), probably better value for performance, more muscly look and feel
BTW, this may be an unpopular opinion but the 6th Gen Camaro facelift is growing on me. I thought it was ugly at first but now it looks kinda cool to me.
Looks like I will have to test drive both later this year and determine...