Does anyone have experience with volume levels between these two cabs? Is the increase in volume and punch when using the UL 410 a substantial one? I've seen a couple of comments that the difference is negligible but am about to purchase one or the other next week and just wanted to check back again. I suppose the answer might depend on which amp you are using. In this case, I'll begin by using my Aguilar 500 AG (500 watts @ 4 ohms). I know this is probably about the minimum power the UL 410 needs, but I also might get a more powerful amp.. so didn't want to completely base my decision on the fact that I now have the Aguilar (after all, the cab is expensive enough to be flexible about the head i'll end up using ) Thanks!