While some parks do arbitrarily enforce a 10 year old limit, many will accept an older rig that is in good shape. I have seen 10 year old rigs look much nicer than 5 year old rigs because the owners really take care of them.
That being said, the CC is considered the higher of the two lines. Basic construction is the same but the CC comes with a few more items as standard instead of options. We opted for the CC because of the standard features after putting the pencil to the paper to see what adding those items to the SB would cost. The CC came out cheaper in the long run. But only you can decide what are the must haves and what are negotiable.