The M50/704 & M60/703 analogy seems to be fairly accurate, except it appears in numerous accounts that, while the M50 and M60 are actually relatively close in overall sound, the differences are far more apparent in the B&W models with the 703 often refered to as "bright" and foreward and the 704 as a little TOO "laid back"

Of course these comments weren't generally forewarded by Axiom fans