There are differences between the different series of Axioms (ie ti, v2, v3) which could account for the differences I've heard in back to back testing. Nevertheless, I find the M22/M60/M80 series to be generally superior to the M50tis that I own. The M3s are another can of worms (if you can find them, look for my reviews of M3s/M50s/M80s and M22s/M50s)

While I own M22v2s, I have not back to back tested them vs M50s or M80s. And I am lacking in M60s, although I set up a set of v2s for a friend.

I am the Doctor, and THIS... is my SPOON!