Lets start and get something out of the way. Performance only = DIY heaven. If you have minimal tools and experience you can build a sub that will outperform both of those subs playing at the same time. Want some info about that hop over on the DIY subwoofer forum.
As far as the ones you have listed...I've not listened to either, but I would think that the MFW-15 would be a winner. Larger woofer, Larger box, larger port. Same amp on both, but looks like the mfw has a very well built cabinet, and the larger port would help eliminate chuffing. And the MFW-15 ranked higher with craigsub. Here is the list.
As far as the ones you have listed...I've not listened to either, but I would think that the MFW-15 would be a winner. Larger woofer, Larger box, larger port. Same amp on both, but looks like the mfw has a very well built cabinet, and the larger port would help eliminate chuffing. And the MFW-15 ranked higher with craigsub. Here is the list.