I think overall Audyssey XT32 (Denon 4520) may have better RoomEQ and SubEQ than YPAO-64 Bit. That means the Denon X3400 receiver has better EQ than the Yamaha CX-A5100 pre-pro.
@PENG and others have posted Audyssey plots of XT32, which looked great.
But for just bass (Bypass YPAO, YPAO Volume On),I feel the bass sounds just as awesome and equal to XT32 for movies and music. But that’s just subjective. Audyssey bass Frequency plots may look better than YPAO.
With XT32, I thought FLAT sounded like Bypass. AUDYSSEY sounded a little suppressed or lifeless.
With YPAO, everything sounded different than Bypass/THROUGH. FLAT sounded way too bright. NATURAL sounded like AUDYSSEY. FRONT sounded like between NATURAL and FLAT, but maybe slightly bright. THROUGH/Bypass sounded the best to me.
I’ve heard Dirac and ARC vs Bypass. I still thought Bypass sounded best.
But with just bass, YPAO Volume “sounds” equal to my experience with XT32 DEQ. That’s the only reason I am keeping the CX-A5100. DEQ bass was my dealbreaker - no way I would buy anything that didn’t sound as good as DEQ.
BTW, the YPAO says 64-bit. Is Audyssey XT32 also 64-bit or 32-bit?