Just so you know where I am coming from I have the 24 karat hits but I do not have any vinyl.
To me, the first 3-4 songs have poorer sound quality than do almost all of those that follow. Song 5 and 10 are out of order but sound really nice. I'd say that the SQ is uneven, but most of them sound pretty good. A few sound downright fantastic in my opinion.
If I take the age, nature, and channel aspect (some songs are in mono) of these into account, I'd score this an 8.5/10. If I compare this to all SACDs I own including Sea Change (9.5) and BIA (9.0), then I'd say I'd rank it around a 6.5-7.0/10. Still a pretty good score overall.
I guess I'd say if you were just looking for ear candy, skip this.... But if you are an Elvis fan, pick it up. I doubt you'll be disappointed, except possibly with the first couple of songs (but then again, this may just be the way they sound on vinyl, I honestly don't know).