ohhh shiz. m5 steppin in with the smack down. anyways, as for musical ability of the subs, thats 90% box... i built a box for my single dd 9518 that was more musical and played lower than any single btl set up i've ever heard... same sub i burped a 147.7 with on less than 2500 rms. either way, this will simply prove that in this particular set up, one sub is more inclined to be successful in that particular scenario. the real test would be doing 20 different boxes, with power ranging from 1k rms to 4k rms, and seeing which subs hold up the best, put up the highest numbers, and are the most flexible in the variation of set ups. that would actually give you an idea of which sub is "better".