Though the second model listed is newer, it often doesn’t mean better.
Have a look in our Samsung forum, at the scan threads for each of the two drives, and you’ll see why.
OEM drives generally come on their own, with no cables, extra faceplates, or any other goodies theat come with a retail boxed drive. However, in my experience often Samsung OEM drives will include a disc which contains a cut-down version of Nero. Sometimes this isn’t the case though, so it’s wise to check.
Lastly, I have the 203N myself and it’s an excellent burner (and reader!).