You can check the features here:
Other than adding SVCD and DVD Builder that have been a few changes. There is a new Sound Editor that will accept .mp3, .wav, .wma, and .ogg files and .ogg support has been added. A new feature in creating MP3 discs is that you can now drag and drop the tracks in the order you want and Audio Central will automatically add track numbers so they will be burned in the order you want. For basic audio and data disc creation there is not a lot of difference although the burning engine has been redesigned.