I have both and the tweeters look exactly the same.

Looks can be decieving.

They are the same. Axiom uses the same tweeter across their entire line, with the exception of the Audiobytes and the M0 (both of which use the same tweeters and woofers)

OK, thats what I originally thought. So the tweeters are different than the version that Jay bought 7 years ago, but consistant with the current line.

You hit the hammer right on the head Fred.

With the nail?

So has anyone auditioned the In wall/On wall hybrid 22 versus the On Wall 22?

I've had the IWOW M22 and listened for a short time leaning up against the wall, before sending them back for the OW M22 (Had problems in wall that caused me not to be able to install them.) I think that the IWOW had a slightly better bass extension, but memory may not serve me well here and they were not mounted in the wall.

I would like to use the new M22 on walls for the entire front LCR but I think using a M22 for the center below my 65" Panasonic will be too low. Can it be tilted up and or could I use a M3 on wall for the center? Is that a mis-match?
Thank you,
Tony

I would go with M2 for center over M3. M2 is a better match.