If you look at the direction of the lapel shadows, you can see his lights are set up farther to Tom’s side than your diagram shows.  Farther away from the camera.   It would be impossible to get that lapel shadow with lights setup at a 45 degree orientation to Tom.  His lights are set up a touch higher as well, if you see the bottom of the shadow of the nose (hard light shadow).  His is exactly even with the bottom of Tom’s nose and yours starts to raise a bit higher.    (You can also notice this by comparing that angles your chin shadow to Tom’s lapel shadow – same source).   Like Joe McNally says, it’s a game of inches  :)Another thing that makes his portraits pop is the focus of the BG light.   That is something you can try to enhance later (burning in the vignette), but I bet Dan gets the BG light focused pretty well in camera. Other details like body positioning and gaze direction are open for interpretation, but if you’re trying to replicate a shot — I would pay attention to those as well.Props for trying to replicate a master though!  That’s what I love about photography; when so many factors and variables are involved, it’s ethereal, and often cannot possibly replicated.   Truly a moment in time.  

http://www.flickr.com/groups/strobist/discuss/72157622852349159/?search=dan+winters

I suppose all you have to do sometimes is ask!