kdude the newer OHM Walshes and GPs are very similar in that regard. However both are two way designs not one driver with only physical crossovers like the original Fs. It turned out to be almost impossible to deliver a long lasting durable and reliable product that way. GP uses Walsh principles on the higher frequencies, OHM Walsh on the lower. GP and OHM F both are/were true omnidirectional designs. OHM Walsh only somewhat in that side and rear sound is physically attenuated with sound absorbing materials inside the can to enable placement somewhat close to walls which works better for most in most rooms.
This is the one guy who I think still tries and claims to have solved the issues with original OHM A and F. Have never heard but would like to.
http://www.hhr-exoticspeakers.com/All good stuff! Different solutions that solve different problems.
Lots of info on various thread here about OHM speakers. Not much else to say. If any specific questions ask away.