Layton has some good points. wasp, you need to have 2 identical tanks, both with all parameters the same, to really get an answer to your question.
Its turning into an "over skimmed, un fed, nutrient poor BB tank" verses "an under or unskimmed tank with a dsb" argument rather than the original point, which was a discussion on how or if sand in a tank gives better colour.
When we do the tank tours (I'll pm you,like to arrange this weekend if we are all free), you will be able to see some pretty good colours in my tank, with a bb, a 902 skimming well, a calcium reactor, lots of flow, and a sand bed in a refugium. Works for me, as Cookies way works for him and crackers way works for him.