I've been eyeing a pair of Cremonas for some time now, just waiting for my budget to match up with my tastes and have spent a good deal of time with both the original Cremonas (both tower and auditor) as well as the new M's. At least to my ears, the new M's are definitely the superior speaker. For some reason, my ears are very sensitive to any exaggeration in the presence reason, particularly from about 1K to 3K. The original Cremonas both seemed to have a bit of excess "bite" in that region that could actually cause me a bit of fatigue. You could only hear it on certain instruments (piano, and occasionally on violin if I recall), but it was definitely there. I think one of the Stereophile reviews mentioned this, even though the frequency response curve didn't show any excess energy in the associated region. I know that SF's are supposed to be very musical speakers, but remember, my ears are really sensitive in this region, so don't go out and call me crazy - everyone's ears are different. You should see me fidgeting when attempting to listen to speakers such as the new Focal 1027/1037Be's (which measure pretty flat across the board), the midrange is like nails on a chalkboard to me (though the new tweeter is fantastic on these).
I had heard the original Cremonas at least 5 times in three different setups, and this excess bite was almost always noticeable. Driving the Cremonas with Krell amps cut down on this a bit, but I could still hear it.
After spending two listening sessions with the new M's, driven by BAT amp/pre-amp combo (I had also heard the original Cremonas at the same shop, on the same amp/pre-amp), I can say that the excess bite is now gone. The M's (both Auditor and tower) just seem to be a bit smoother to me, more like the Amati Anniversarios (which I loved, except for the price). In fact, I actually think I like the Cremona M's better than the anniversarios, as they just seem to have a bit more "life" to them as well. Forgive me for not being able to describe this, but the sound just seemed to be more "real." Bass seemed to be more crisp and faster than the Original Cremona as well. I also think that the speakers revealed more detail, without bashing your ear drums in with exaggerated upper-midrange and treble.
Frankly, I don't really care what a frequency response curve looks like (especially when it was done in someone else's room), my ears know what they like. Yes, the frequency plot should show any gross abnormalities in the speaker's output that would be indicative of poor design, but trust your own ears first and foremost. After all, it is your money. Just go listen to the new M's in as many places you can (and hear how they sound with different amps/pre-amps/cabling) and see if you like them. Get a home demo if possible. Don't forget to listen to the new Elipsa Auditors as well, which could actually work better in your room if forced to be a bit closer to room boundaries.