Aside from the box and controls on the DPS and remote for the DLS, they are the same subs. They have the same specs and sound the same. They have the same features. Personally, I like them very much for SQ, punch and versatility. If you are talking $450-$600, you'll have to compare them to Rocket, Outlaw, Hsu and SVS. All bring different things to the table, it depends on what you want. Whatever you choose you're going to get quality.