Friend their is one thing I can give you that is FACT, do NOT EVER listen to anything Misfit has to say, this guy makes stupid look smart. I am telling you if he gives advice go the other way, he once talked about how he was broke and wanted to fix his ride up with cheap junk, in the next post he said he went out and bought $15,000 of audio EQ from a shop that was closing, the guy talks out of his ***.
Subs Will not sound the same either, their is no way you're going to make a kicker sound like a IDQ I don't care what box you have.
The best thing I can tell you is this, go with what is in your price range, then going with one of the major sub companys...no, not kicker, alpine and stuff like that but the ones we are always talking about on here like ID, DD, Fi, DC, RE.........you might get one that is a little louder or one that sounds just a little better but they are so close that any of them will make you really happy. I think the questions you are asking are just to hard to answer, everyone has a favorite but few of us have a ton of them sitting by each other to listen and see what sounds better or which is louder, so we post by memory or systems we have had and redone. I would rather have SQ over Sp and that is why I built mine the way it is.