If I remember correctly, the 2 songs on the original SACD sounded re-recorded. To me, at least. If you listening to these 2 songs in their original versions, you'll notice that there is very little, or no, breathing sounds in between lines from Sam Hui. In fact, if you listen to all of Sam Hui's old songs, you don't hear much breathing sound in between lines from him. However, when I first heard those 2 songs on the SACD, I suspected they were either re-recorded by Sam Hui or something different was done. Just my opinion.
我收藏的經典粵語流行曲CD (now over 1,500,000 views - as of April 9, 2014)