(FULL DISCLOSURE: I wrote one of those questions referenced, and suggest including another similar question to consideration.)

If you're going to merge those two, also merge in my other canonical question:

 - [How do you do Load Testing and Capacity Planning for Databases][1]

However, I think that both (all three) have a place, and could all be displayed.

If they are merged, in the spirit of being a resource for Professionals, let the opening be "We are not going to help you with your Capacity Planning and Load Testing.  Here's Why: (answer regarding your special snowflake goes here)."  Then, "However to be helpful, here are some thoughts we've put together on how to go about it."  And possibly links to the "[Web Operations][2]" and "[Art of Capacity Planning][3]" books.


  [1]: http://serverfault.com/q/350458/50875
  [2]: http://shop.oreilly.com/product/0636920000136.do
  [3]: http://shop.oreilly.com/product/9780596518585.do