The Dynaudio speakers have a midrange bloom type of sound. The midrange is very full and strong and forward and lively (probably more forward towards the upper mids). This type of character extends into the tweeter area as well. The tube-like bloom is not very accurate, but it is loud, exciting and lively. Very strong and forward presentation.
The B&W D2 series have very clear and accurate highs, due to the diamond tweeter. The bass is good and tight. Mids are somewhat soft/warm and a touch laid back (due to the Kevlar driver), but they are very natural sounding. It represents how a voice sound "naturally" much better. Overall, I think the B&W is a more accurate and natural sounding speaker, but not as lively/strong as the Dynaudio.