The Nero package whether it comes with your CD-Recorder or if you purchase it seperately has several limitations. E.g. You can only rip up to 30 tracks into MP3 / MP3Pro, AAC encoding is limited to 50 tracks, MPEG-2 is an addon purchase, etc. The reason for these restrictions is that these utilities all require seperate licenses. Nero’s website (http://www.ahead.de/ ) provides options to purchase these addons seperately, although each is priced differently. As you already need a licensed copy of Nero to purchase any of these, I don’t think they will give you a discount just because it’s shipped with a CD-Recorder.
This is much like Microsoft in a way, e.g. if you Purchase the Plus pack for Windows XP, most of the utilities that come with it are limited functionality, hard to believe. This applies to many other software products as well, including Roxio’s Easy CD creator standard edition.
If Nero were to ship with fully licensed codecs, then Nero itself will be a very expensive product, and thus wouldn’t be competitive against other CD recording products.