One of those is more uber than the other, seems to me like its the W7. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
If it's a situation like you say it is, I would have to go with whichever I could get more money for. As people said though, the Uber is special, the W7 not so special, except to poor people.
13W7's are going for around $500-$600 on eBay, the last uber was sold ona forum for what, $450?
Also, the majority of people in the car audio world won't know what the hell an uberwoofer is, and probably won't believe you if you told them..
I think it woul dbe easier to sell the W7 for more.