https://www.dropbox.com/s/2x1tw5f6yxfd2yu/2013-12-15%2007.41.57.jpg

This is the SE unit. Note larger number of splines and shallow lobe profile

https://www.dropbox.com/s/e2oddafrsc2gmwj/2013-11-24%2006.32.56.jpg

This is a standard HD unit. looks similar to Morgan unit. Note different cam profile.