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I have used both a DSLR and CCD camera now.
I think as far as the chips go the modern DSLRs are way ahead in terms of noise. My Nikon D4 at 1600ISO produced almost noiseless images at ambient temperature. By comparison my new SBIG STT8300 produces massively more noise even when cooled to -30 degrees. There is simply no comparison. It uses of the "old" KAF chip, they cannot match the modern full frame DSLR chips. It is not surprising really when you consider the sales volume driving chip development in the DSLR area compared to the very modest market for specialist CCD cameras.
I got a CCD capability for two reasons
1/ So I could collect and combine LRGB data with Narrow band data
2/ Get more sensitivity on the sensor to certain wavelengths like Ha.
Brett
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