Are Ohm Walsh Speakers the Poor Man's MBLs?

No I don't think so. Ohms are Ohms and MBLs are Pinapples. yes both radial yes inefficient no completely different air motion interfaces. MBL has strips of an that rely on an electrostaic air disturbance versus ohms which rely on more conventional cone motion using the back wave of a narrow cone radiating in all directions. Are klipsch a poor mans Avant Garde same technology this time ?

So can you keep the MBL speakers or are you considering buying them? Not clear on what you are saying.