I test drove the Chally and it does have a bigger back seat but there was no beating the deal and the price that I paid for the Camaro. I have two kids 7 and 2 so the mini backseat is ok for now. I really like both cars but for me ithe camaros' redesigned style brought it back to its glory days but at the same time made it different. Were the chally is basically the same. Mine is a manual and even in LA traffic I'm comfortable with it. Once you ride the bike you never forget.
I wish you the best of luck with your decision.
By the way I test drove the Chally and never actually did sit in or drive a camaro. It was love at first sight. ever since the LA car show in 2006.