Is there a difference in shape/size in front and rear c/l motors?

The reason I ask is that I sold a front o/s mech to someone on here and they reckon it's from a rear door.
I have a pic of the one I sold him.
Now I know the buyer is talking crap as I only removed the front mechs due to both rear doors being damaged.

I am thinking perhaps the buyer has realised what a PITA it is to remove and perhaps wants his cash back.