Whole bandwidth? Not really. Each CCD is ultimately only receiving the light passed through the filter - in essence exactly how a 1CCD + combined RGB filter works.

If the potential to get the whole light spectrum is there, you'd end up sending three exact copies to each CCD and you'll end up with a jumbled mess. R + G + B with exactly the same data doesn't make a pretty image.

All things being equal (testing situation: assert that you have equal glass and equal quality optics AND same size CCD between 1ccd and 3ccd), the only quantitative enhancement of 3ccd over 1ccd+rgb is the possibility for 3 times the digital precision when number crunching. From the look, there's no difference, but the higher datarate allows software (hardware) to do more and be more accurate in its calculations.

Sorry, my sentence was poorly composed. I meant to say full color bandwith of each principal color : the "red" CCD would recieve the full red color bandwith, the "green" would etc etc...