[url=http://www.missingremote.com/index.php?option=com_content&task=view&id=4486&Itemid=256]Original Article Link[/url]
The only thing that matters to me is which one sounds better to my ears.  ;D  (That’s a joke… I know they should all be identical.)  I’ve had many issues with playback through ffdshow, so I tend to steer clear of it.  On an HTPC, processing power is usually somewhat limited because people are going for quiet/silent, so using ffdshow may not be feasible for a number of people.  It is an interesting comparison, though.