The content licence applies to how you use the content. On that front, all it requires is that you provide attribution and the same licence of your copy/modified version.
Keep in mind that the answer policy (what are considered acceptable answers) is distinct from the content licence. The content licence governs how you may use the content elsewhere (which can be another answer, on your blog, etc.), while the answer policy affects what is allowed in your answer. While you may have satisfied the requirements for using the content, your answer may or may not be up to standard.
For example, it is generally discouraged to copy and paste large chunks of information, and paraphrasing is recommended. Also, in some cases where an answer is merely a duplicate of another answer with no additional meaningful content (e.g. 'this worked'/'thanks' type answers), they may be deleted. On the other hand, 'consolidation' answers are sometimes encouraged. Sometimes, editing for minor changes is encouraged over copying and modifying for a new answer.
There isn't really a hard and fast rule for which way to go - it is very situational.
In your specific example, it looks reasonably different, though I don't really have much to comment on it. You do comment "minus linkrot", implying that you have fixed/removed/omitted some broken links - generally, it is recommended to fix links where possible in the original answer too.