I have both a De Vere 504 dichroic and a Kaiser VPM9005 condenser. When printing black and white, I like the slightly more "open" (contrast) and ever so slightly less cutting look of the De Vere (which is diffusion based) - however, when actually making heavy use of filtration more than just basic stuff, the Kaiser wins out as exposure times are kept nearly constant for different grades. With the De Vere, and many other dichros, you have to recalculate based on filtration. This is a pain in the ass usually. However, what isn't a pain in the ass is noticeably less dust issues with diffusion based enlargers and I just generally feel more connected to the De Vere vs the Kaiser (but still like the Kaiser).