I've used DPA 4060, B3 and MCE400. The B3 and MCE400 just sound "more natural" to my ears, regardless of the exact frequency response, grids, etc. The DPA have great detail and sound realistic, but if you listen to music, they just don't sound pleasant for me.
Hey, if those DPA4060 sounded so good, we'd never use the (Nickel) 4006 or the Geffel MK221 would we? It might be something to do with the diaphragm (stainless steel in the B3 and Nevaton). Or it might be that the DPA4060 is distorting somehow (at higher frequencies).
Years ago I bought the DPA4060 thinking "my search is over". But I was wrong, there are better mics out there...
Richard