I have learn one thing over them 14+ years in being in car audio when it comes subs. It more of the enclosure. I mean I built a sub system for a customer to made actually man sign a discloser agreement not to copy the design. It was a tensions line design for a car that a friend of his designed for him. The design use a 20 bux subwoofer from
partsexpress. He gave me the design and the sub, I say, I will build it to your specs, but if it does sound good its on you. He say no problem. I built it and man let me tell you this was one of the best sounding sub systems i have heard.
The first CV stroker is another sub. When it came out it was suppose to be a SPL sub, but in the right enclosure it is a great sounding sub. Don't get me wrong, if you start with a great product it is easier to get there. There is not many subs design for just SPL and if it is, it is usual a custom design and built to be a one note wonder.
DD makes great products and just about any of them can be made to sound very good in a enclosure designed for SQ.