Maybe Peter can give you better detailed comparisons but I'll give it a shot.
The CSs have a broader range in sounds than the average P/J and a better low end in the higher positions on the D & G strings. Compared to the SG Bass it has a much more open sound. I think sound-wise it's somewhere in between a T-bird and a J, but leaning towards the Bird because of the mahogany body.
The Bach Non-Rev T-Bird DeLuxe with CSs Peter and Rob did put together sounded just a little bit better to my ears BTW.......
I sold the Decade because my arms were too short
Some years ago a shortie version was announced but it never surfaced ... I had a Ibanez ARTB-100 mounted with CSs and it's a great little monster but playing premier league it's not .....