YEs, Magnepan has a dealer network while OHM/Walsh went factory direct only back in the 90s. I owned Maggies and older OHMs concurrently from 1985-2007. Then I realized that OHM was still around and providing upgrades for their old speakers. I decided to try this and ended up dumping the Maggies and a pair of nice B&Ws as a result.
The Walsh driver is more a different way of looking at how traditional drivers produce and propogate sound and the theory required to deliver optimal results using drivers in this different manner. I've read where in Lincoln Walsh's theory all pistonic drivers operate as Walsh drivers as well, just not very well. There are really only 3 flavors of marketable Walsh driver around today, those used by OHM in their CLS driver configuration, the German Physiks DDD driver, and "TLS" designs produced by a gentleman named Dale Harder which are modeled after the originals produced by OHM years ago, which were reknowned for their SOTA sound quality when working and their fagility which resulted in the original designs not being a viable long term consumer product, despite the stellar results under normal conditions.
The Walsh driver is more a different way of looking at how traditional drivers produce and propogate sound and the theory required to deliver optimal results using drivers in this different manner. I've read where in Lincoln Walsh's theory all pistonic drivers operate as Walsh drivers as well, just not very well. There are really only 3 flavors of marketable Walsh driver around today, those used by OHM in their CLS driver configuration, the German Physiks DDD driver, and "TLS" designs produced by a gentleman named Dale Harder which are modeled after the originals produced by OHM years ago, which were reknowned for their SOTA sound quality when working and their fagility which resulted in the original designs not being a viable long term consumer product, despite the stellar results under normal conditions.

