Guys, there are different and valid approaches to loudspeaker design and you should never deal with absolutes and make sweeping statements about any type of design approach. What matters is how a speaker sounds in a real room and not just a theoretically perfect on-axis measurement.
I am not well versed in the Axiom design yet since we haven't reviewed it but the RBH speaker discussed here is a much different approach. RBH is using what they refer to as a dispersion averaging array which minimizes the lobing effects of the multiple drivers. You can read more about this in my formal reviews of the T systems.
At some point we should probably write up a formal article comparing each of the methods showing pros/cons. Maybe if enough people bug us, I can get Paul Apollonio to write it