Comment by robdachshund

Digital radio is very very low bitrate. A good FM signal is superior.

FM is capable of the same frequency response as CD, and it's a purely analog signal. If you don't have interference, you are getting a very pure stream of audio. The station is also probably using CD grade audio, so most of that quality is preserved.

From an audio standpoint, FM is a pretty decent sound medium. It's going to depend on your equipment, signal, and if you are moving.