I'm not sure about mp3 disks but data disks burnt with mp3's will retain their id3 tags & are playable as is in different devices. Certainly burning a dvd with mp3's via iTunes allows the songs to be grouped by artist & album & a menu to show such on the dvd player. There's a lot of mp3's you can fit onto a dvd! lol

Most decent burner programs such as nero & roxio will convert mp3's to CD when you choose CD audio output as compared to mp3 disk or whatever.