What's the difference between a Doctor of Computer Science and a Ph.D. in Computer Science?
This is the first I've heard of a "Doctor of Computer Science" degree. Not having a dissertation requirement is a clear sign that this is different from a "standard" Ph.D program. A Ph.D (in any discipline) requires you to produce an original piece of research that you defend to a committee of experts. In addition, most Ph.D programs will have course requirements, residency requirements and so on.
Update: Some googling led me to the Wikipedia entry on 'professional doctorates', which most closely match the nature of the degree the OP describes. As Austin Henley points out, this is close in spirit to an MD (USA) and JD.
If you are interested in a career in research, I would strongly recommend avoiding "executive-format" programs such as the one you've linked to. A program like that is not a standard PhD program, in that you are not required to produce a piece of original research, and therefore cannot claim to have met the standard of being an independent researcher (and problem-solver) at the end of your program.
If your long-term interests, however, run more toward being in management and other non-technical careers, then perhaps this would be an option—but I would only recommend it if you were already working in industry.
The Doctor of Computer Science program at Colorado Technical University has a dissertation requirement. At one point there was an optional four paper option but it is really a dissertation broken out into three papers that are the dissertation chapters broken out separately. The fourth paper is a publishable journal article. Thus you are doing much more work if you elect not to do the dissertation. The current program has removed the four paper option and is now dissertation only.
I am an alumni of the program and currently in a tenure track role at a state university while also holding an honorary position at a Tier 1 (top 100) institution. When I was in the program we had three residencies per year and now they have two. Remember that not all institutions are allowed to have a PhD but may have another terminal (doctoral) program. My Research Gate profile is below however you may contact me on LinkedIn to ask any questions. Additionally, I can point you towards other alumni who are professors West Point Military Academy, George Fox, Alabama A&M University, The Oklahoma State University, and other institutions.
Research Gate Profile https://www.researchgate.net/profile/Maurice_Dawson2
LinkedIn Profile http://www.linkedin.com/in/mauricedawson
Both programs are great but you have to look at publishing peer reviewed research immediately to bring value to your terminal degree. Again feel free to reach out to me.
-Mo