If you search the forums, you will find lots and lots of discussion. Most prefer CreateSpace.
Since both versions are sold primarily on Amazon, you can't publish the same book on both platforms. You can however publish one book on one and a different book on the other if you want to for some reason.
The ultimate product is the same, but getting there is different. The guidelines are not quite the same--if you've got images, decorative elements, facsimile pages from other books, etc.--CS's while it contains errors, is more likely to answer more of your questions. The CS forum is much more active than this one, and it is one of the major selling points for CS in general.
Also, CS has a printed proof, and that's a big deal. Wander over to CS, click on Community and take a look at the forum. Unfortunately, the site is under constant spamming, so periodically, we have to remove lots of garbage.
KDP Print Beta was rolled out at the end of September. The process was buggy, and it seems to remain so to this day. The quality of the books that actually go on sale is rather low, as you can see by doing a search on Amazon for Independently published
Its sole advantage is that the author-publisher gets to see his or her paperback sales on the same page as the Kindle sales. But really, how big an advantage is that? How many seconds does it take, really, to check one's sales on Createspace--ten seconds, thirty seconds?
In exchange, you get that buggy publishing process, no physical proof copy, no discounted author copies for gift or resale, and no distribution to Barnes & Noble or to brick-and-mortar bookstores. (Most small bookstores will, as a favor to a customer and perhaps a small surcharge, order a Createspace or IngramSpark paperback.)
My advice is to stick with CreateSpace with its excellent cover wizard, helpful community forum, and direct-to-author discounted sales.
Good luck! -- NJ
The book: Notjohn's Guide to E-Book Formatting (and print as well!)
A large part of BookSurge's business, and later, CreateSpace's, is providing p-o-d services to traditional book publishers. Through p-o-d, they are able to keep books in their catalogs that would otherwise dropped once their inventory dries up. These cannot be badly printed. Same for the rest of us. (I do figure an average of about 1-2% spoilage.)
I would wager that what you're seeing as negative reviews for "Independently Published" has to do with poor writing, editing, design, formatting . . . Most self published books look self published. That's not because of the printing, binding, and trimming.
I assume, could be wrong, KDP Print uses CS's presses, pressmen, technical support, etc.
I just wrote and published an article on this ( KDP Print vs Createspace - Which is Better? ) and thought I should bring over some of my findings to this forum.
By now most self-publishers probably already know the answer to that question in the title - Createspace is a much better option than KDP Print.
Here are the specific reasons: Benefits of Createspace:
Possible to order physical proof copies (not possible with KDP Print)
Possible to order wholesale author copies (not possible with KDP Print)
More favourable from a print standpoint
Expanded distribution possible (not possible with KDP Print)
2x faster payout time - 30 days, instead of 60
Phone support available
Higher royalty in the European market (.de) for b&w books with a page count less than 110 pages
Allows for diversification between publishing companies
Benefits of KDP Print:
Easier, faster and more convenient to set up a paperback
Make changes to your paperback without losing royalties and slipping in rankings
Accounting and reporting benefits
Access to Amazon's japan market
Towards the end of my article, I also go into some possible future scenarios for these 2 POD companies.