LPs and real sound waves are analog. CDs are purely digital. So the problem is converting the stair step values of a digital "wave" into an analog copy. The higher the resolution of the digital copy, the closer to the analog version one gets. Same as a film image and a digital one. The higher the resolution the closer they appear to be the identical.
I'm not sure what difference the metal used on CD. If the data is the same, so should be the output. However, the reflected laser light may not be the same from Aluminum and Gold, there may be more data loss with Aluminum. But you also mentioned "remastering." That suggests that the two CDs were not made from the same original data. "Remastering" usually involves cleaning up and noise (actual or equipment introduced) during a recording. It may also include modifying the equalization slightly. The point is, I don't think there is any definitive standard for what constitutes "remastering." Then, there is "re-mixing." This involves taking the original tapes (almost always with multiple tracks) and re-combining them slightly differently than the previous media. There may or may not be any "remastering." But it is easy to add more drum, for example, to the final mix. The final mix is a judgement by those doing the work which may not include any of the original artists!
In my mind, the difference in the two CDs had more to do with the "remastering" than in the type of reflective metals used to coat the pits in the material. And, as our
Maven says, the older our 'equipment' the less capable it can be. Fortunately, sounds are not subjective and are always pure...
