I have listened to both speakers in different demo setups and was strongly considering the Concertinos a few years back. Very musical and involving (more so than the Concertos IMO), pleasant, nonfatiqueing sound. Not the last word in resolution though. I believe they are less sensitive to the faults of the front end and amps than a lot of their competition, which can be very important if your system tends to by harsh, grainy, bright etc.
Good luck
Good luck