By chance I'm at the OKCon conference on open data, so it's appropriate that it is shared! The link is here - it's not been updated since May 2011 - if anyone wants the original Excel files, drop me a PM. I don't think either provider should be expected to update it though, nor would they want to.

There was some... pushback behind the scenes from one of these providers and it's a challenge to track their ever-changing capabilities, but the exercise might still be useful. I travel a good deal less these days so no longer subscribe to either provider, and rely on flightstats.com for broad inventory availability.