It doesn't sound like either version is formatted well. One of the reviews in the Del Rey publication says:
One is cheaper than the other but contains many many typos. There are two just in the downloadable sample so beware. The bad edition is published by Del Rey for $6.39.
But then a review on the Rosetta version is not complimentary at all, either:
This is a poor conversion to the Kindle. There are a large number of typos. Text formatting is almost totally lost. Only chapter breaks are apparent. Section breaks which quote the encyclopedias are marked with italic text, but otherwise all the sections run into one another with no visual indication that a new section begins. From reading this, I'd guess that the publisher simply scanned the text and performed no copy-edit or proofreading.