Gary, I own both M22's and M3's, and while I haven't performed extensive A/B comparisons between the two, their treble characteristics are certainly similar. But, as has been mentioned, the M3's have a slightly warmer, less forward sound than the M22's (and M60's from what I hear). So, don't expect a dramatically different treble character between the different Axiom speakers, but there definitely are the warmer vs. brighter speakers in the lineup.
When I compared the two, I preferred the more forward sound of the M22's, which I kept in my main system, and put the M3's in my bedroom.
