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yes.. essentially, but the difference is not (in my opinion) substantial enough to warrant the cost of the upgrade... In a 2-5min DSLR exposure, the noise is easily negated by taking darks, and in shorter exposures, the difference in signal (excepting the Ha bandwidth on a non-modded dslr) will be minute... when you push it out to 20 mins or there abouts, the CCD's come into their own.. the extra dynamic range comes into play on brighter objects and stars, the difference in dark current is a lot more noticeable.. I think unless you can feed a good quality CCD 20 minutes of light per sub, then you should probably stick with a DSLR...
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