What's interesting is what information the New York Times includes that is not covered in the NSA document, presumably from unidentified officials and former officials.
The document on Der Speigel speaks primarily about taking copies of intelligence from SK hacking efforts against NK and also taking copies of intelligence from NK hacking efforts that had in turn been hacked by SK (and in turn by NSA - "fifth party collection").
The document mentions the NSAs unwillingness to rely on intelligence filtered through so many third parties and made efforts to establish its own foothold.
Essentially none of the article is backed by the document as a first source and must have come from the unnamed sources.