Ok folks!

No one can say they cannot see the difference now.

A back mover drives off the hindquarter and a leg mover pulls the hindquarters along.

Here is a good example of a leg mover in Totilas..... http://youtu.be/mrRgNuYJLAY

Here is a good example of a back mover in Design.... http://youtu.be/U1XQMAywWOY