Disquette, here are my test results.
WF5/Flametongue:
http://www.fusionpics.com/show.php/38906_wf5ft.jpg
WF5/WF5:
http://www.fusionpics.com/show.php/38907_wf5wf5.jpg
These were fairly typical results. Values are for Black Planar Edge MH/Malchazeen OH, using something close to my AP/crit/hit pre-2.1 gear buffs.