TServo2049 said:

I don't know. I just assumed PCM always sounded better than compressed DD.

Unless they give it a particular anemic bitrate or screw up the encoding, DD (and other lossy codecs) should sound identical to a lossless track (of the same master). The whole idea of lossy compression is to remove data that the human ear can't hear. Lossless audio is useful for editing as going from one lossy codec to another will produce noticeable decay.

That being said, poor encodes happen as does over filtering audio tracks. (Which is one of the reasons this thread exists.)