They do sound similar although I found M60's to have a broader frequency response than the Monitor series a few years ago. The M60's extended lower and the soundstage seemed to be more enveloping somehow, almost like there were speakers on the side of me. I auditioned the entire Monitor line at Audio Ark here in Edmonton vs. the M60 for 2 hours or more using their Arcam amp and CD player. The rep there was awesome. I was almost sorry that I couldn't bring myself to like to Paradigms enough to buy them. If you like the Paradigm sound, you will be very impressed with Axioms. Nothing that I auditioned in the price range (or even double) of the M60's could touch them including Paradigm, B & W, Kef, Energy, or Klipsch.
Onkyo TX-SR707, M60's, QS8's, Velodyne DPS-12
Denon AVR-989,Energy RC-70/LCR/R/10, SVS PC 12+