Actually, that "smoothness" and sense of ease in presentation is more apparent to me in the midrange on up. The precision of articulation in the bass, the greater spaciousness in the midrange, a smoother treble - that's what I hear, in general. It's not night and day, though. It's just enough to say that these qualities are just more present. An analogy might be like tuning a violin or guitar by ear. There's the moment just before you nail the relationship between two strings, say the 'perfect 4th' between E and A, and finally nailing that interval, when the vibrations lock in place. You can still play the instrument just outside of it absolutely being in tune and most people won't notice, but once you nail the tuning, there's a sense of "ahhh". The difference between 33s and 45s isn't like the heavens suddenly open up and the chorus starts singing with the latter, but it's enough for me to notice consistently with the medium of 45rpm 12" records. There was an example from a couple of years ago when a member, I believe it was @Greenmonster2420, was insistent upon that the Analogue Productions' 45rpm of Herbie Hancock's Maiden Voyage was superior to the Music Matters 33, in spite of the latter using a fresher sounding tape. It meant double-dipping for me, as I already had the MM copy. On his urging, I got the 45. Well, the top end sounded comparatively rolled off with the 45, but the midrange on down was still fully there, and there was that spaciousness and overall 'sense' of relaxed presentation that was superior to the 33. The 33, in comparison, sounds a bit tight or slightly more rigid. The difference is in the feel, the sense of rightness. Not night and day. It's subtle.