Slashdot has a post directing reader's to SCO's marketing website titled "5 Reasons to Choose Unix instead of Linux." Here they are:

1. SCO UNIX? is a Proven, Stable and Reliable Platform 2. SCO UNIX? is backed by a single, experienced vendor 3. SCO UNIX? has a Committed, Well-Defined Roadmap 4. SCO UNIX? is Secure 5. SCO UNIX? is Legally Unencumbered [The SCO Group | SCO Grows Your Business]

Items 2,3, and 5 are contestable on a variety of grounds. SCO may have a "Committed, Well-Defined Roadmap," but it doesn't appear to have anything to do with supporting or developing software. I also find it a little strange that they call themselves an "experienced vendor", when they have never actually developed a successful software product. Their ownership of Unix is due only to a limited purchase agreement. In its entire history, the company has only ever profited from lawsuits. SCO's CEO, Darl McBride, does not have much of a background in successful business activities. Prior to joining SCO, he was self-employed as a Plaintiff in a million-dollar lawsuit against his former employer, IKON Office Solutions (a.k.a. the craziest company in Utah). Yes, I am saying that his job at the time literally was suing his employer.