I have two older avrs with XT, and one with XT32....never used the older basic MultEQ. XT32 was a significant improvement over XT and can only imagine a bigger improvement over MultEQ. Newest versions of Audyssey also have the Editor App, where you can limit eq to just sub-schroeder if you want to and install custom eq curves, etc, so current XT32 is even better than the one I have (which was before the app).