have you checked both subs with an SPL meter with something like REW? I don't know if it should be more detailed or not but a lot of times you are hearing whats going on with your room placement. A bump or low at certain freq can cause subs to sound less or more detailed.
I have been having a problem with a single sub that I have right now. Depending on placement it sounds very musical other places not so much. Problem I am having is that the place it sounds very musical it's response drops off very sharply below 40hz till about 20hz. But above 40hz I get very flat response. I have found one place that gives me response to 34 hz before the sharp drop till about 20hz but above 40hz response is all over the place. So I am going to continue to test till I can get the response I should be getting.
I have been having a problem with a single sub that I have right now. Depending on placement it sounds very musical other places not so much. Problem I am having is that the place it sounds very musical it's response drops off very sharply below 40hz till about 20hz. But above 40hz I get very flat response. I have found one place that gives me response to 34 hz before the sharp drop till about 20hz but above 40hz response is all over the place. So I am going to continue to test till I can get the response I should be getting.