haven't heard both (or any emm gear for that matter), but i recall this being discussed before. you might double check the archives. from what i recall, the general consensus was that the best sound was:
1. dcc2 SE + cdsd SE
2. cdsa
3. dcc2 + cdsd (non-SE versions)
1. dcc2 SE + cdsd SE
2. cdsa
3. dcc2 + cdsd (non-SE versions)