Best Practices for Targeting a Competitor's Content?

We noticed a key competitor is seeing significant traffic from a blog list of the "5 types of..". The blog is one that isn't that packed with insights and detail.

We've gone ahead and drafted a post titled "10 types of.." and are working to ensure our post has substantially more information than the competitors.

So, two main questions:

1. Are there any other best practices we should think about when it comes to this content replication strategy?
2. This is a competitor that we communicate with. Are there any disadvantages to back-date the post and releasing it quietly?