Those are rather different designs, what size room are you looking at using these in and how much space are you willing to allocate towards a sub? If you have a small room and space is at a premium, a SVS ported box may just take up too much room. If that is the case, I'd look at other small sealed designs such as the SVS SB13-Plus or the HSU ULS-15.
If, on the other hand, you have the space to give and are looking for maximum output, of the two you offered, then the SVS is going to have much more extension, output, and comes with a great warranty/service package. I'd give the nod to the SVS.