I am judging solely based on the CD reproductions (my LP collection is about 20k km far away from Mexico where I live now, and there I have no decent audio equipment now). I have heard many well and some excellent recorded CDs, even ones which are not remastered. And some 50s remastered ones, for me, sound better than some 90s and later made (jazz) CDs. Even in classical recordings, I often find that early analog recording on CDs I like more than most of the digital ones (decent labels).
Above this general observation, I still remain surprised by the variation in quality of Miles Davis recordings, one of the most outstanding jazz artists (and I think the issue here is not precisely LP vs CD), especially most of his 80s recordings. I do not have remastered ones though - don't know how remastered "Tutu" sounds like, and "Aura" is a digital recording anyways, Decoy is almost impossible to audition. Some 80s ones are acceptable though, you mentioned Amandla, also Dingo (a soundtrack in fact) are OK. Some late 60s and 70s albums are well recorded, Big Fun (nice quality), also there are some OK recordings (e.g. A Tribute to Jack Johnson, ones from compiled Panthalassa); at the same time, some other fusion albums recorded during the same years (1969-1970) are no good inquality (e.g., Bitches Brew, Live Evil). What would say Teo Macero? And the point is not the record label. The same Columbia label Winton Marsalis records, all of them have the same good quality (in fact, no difference between 80s, 90s and later made ones, all of them are good; An American Hero, recorded in 1980 (released on Kingdom Jazz label in 1986) has an excellent sound quality).