Engineering wise - despite what most of your are saying, the Corvette is a far superior car.
The lastest Camaro is still the best that they have ever built, but the Corvette is and always will be a much more refined car that can be compared to italian and german super cars where by the Camaro is just not in the field of engineering. Dont get me wrong, I have a brand new Camaro on order - but I also have a C6 Corvette
As far as trading - it is not a bad deal but at the same time you are stepping back 5 model years into a car that is more used that what you have. The good thing about it is that the depreciation is far less accelerated than the Camaro is at this point and 2-3 years from now the Corvette will be holding a higher overall value than the Camaro will.