I noted the same thing on Samba Pa Ti. The guitar solo sounds like it was recorded years before...almost during the heyday of 78’s. It sounds like that way on the MoFi SACD also. (I haven’t listened to the stereo layer on this new SACD as of yet.)Such an improvement on DTS disc in terms of the heft and presence of the overall auditory impact. But it didn't quite knock me off my seat in the way the Santana disc did. In fact, Abraxas in quad doesn't didn't quite hang together as well at that version of the first album. And, sorry, but the quad mix of Samba Pa Ti remains such a disappointment. The guitar sounds like it was recorded, badly, in another room with the doors closed, and where's the bass? Better than the DTS disc, but it still doesn't gel the way entire first album balances discreteness with integration throughout. Compare the quad Samba Pa Ti with the stereo version on the new disc - the latter blows the 4 speaker version away on every level. So an 8 from me overall.
With this particular recording, I find some tracks preferable in quad, such as BMW, some with PLIIx, some with Surround Master, and none with Logic7. (Can you imagine that? Me unpleased with something played through Logic7. That’s even more earth shattering than Trump showing displeasure with Fox News. )
Anyway, I still give this release a 9 because it is superior to all previous official releases of this quad.