There are sometimes bad batches with CD brands. They switch factories where they are made depending on demand & supply abilities. So quality can vary at times.

I notice TDK also have a variation of models of CD's (varying in quality.) I used to use TDK Gold. Believe it or not, I still have a supply of Kodak Gold left hidden away in a dark cool place. They were always the best in their day. Pity Kodak stopped making CD's.