How do Ohm Walsh speakers compare to Maggies?

Frazeur1 summed the MIcroTalls up pretty well. I actually went from MWT's to a pair of Harbeths, and in my room I'm much happier. But that's in my listening room. I still always recommend Ohms - one thing to add, as easy as the MWT's are to place, they like a somewhat (not overly) damped room. Or I should say, a room that isn't overly live. Other than that, they're easy to place.

One or two 2x2 acoustic wall panels on side wall prime reflection point based on your listening position will go a long way if room is too lively.

I had Ohm MWT's and then 1000's for awhile a number of years ago. I'd second what was said about room damping. My room at the time was very, very lively (hardwood floors and no carpet!) and I think that the sonics may have suffered as a result. In particular, I found the high end lacking in resolution... again, I think this may have been due to the reflective surfaces in the room.
As I've often said in the past, either the pseudo-omni (pseudo only because the drivers are damped in the back to minimize near wall reflections) does it for you or it doesn't. If you love the huge, enveloping sound stage (which I did) then you may be utterly enchanted. If you want mini-monitor-like image specificity, then you may be (as I was) frustrated after awhile. But I totally get why people who adore them feel that way.
One other thing: John Strohbeen is a prince among men and will take good care of you, and you can't beat the in home audition deal.
Good luck!

Hardwood floors and floors in particular can interact quite a bit with the bottom ported OHM Walsh speakers for sure, more so than other designs. At least that is what I find with my models that use older refurbished cabinets with no plinth underneath. They sound totally different on my home's foundation level floor than on upper levels. Other aspects of their interactions with rooms is less unique.

I've had older Walsh 2s on wood floors on a couple of occasions over the years and found the sonic effects to be quite significant.

The solution is to place them on a more massive platform of some sort to help minimize the low frequency acoustic energy that gets transmitted to the floor. A fairly easy and inexpensive tweak. Most newer Walsh cabinets have a wood plinth underneath which should help quite a bit our of the box in most cases.