Same amount of steps. This is only an issue if you're planning on re-ripping.
MP3 needs to be converted to PCM data to be burned to an audio CD.
The CD player needs to convert the MP3 to PCM data in order to play a data CD.
EDIT: I forgot to mention the most obvious benefit from MP3 CD's: You can store several times more music on them.
Edited by chewy4 - 12/11/12 at 10:55am