Might want to try the sub forum, though you won't get much help since not many here have ever heard or used either one.
Unless you have space constraints that limit you to subs of that size you'll be recommended to go with an internet direct sub like SVS, Epik, HSU etc...
SVS makes a 14" cube with a 12" woofer that should provide much better output than either of the subs you've mentioned.
http://www.svsound.com/subwoofers/se...&category_id=6
Gene