For some reason the Trijicon sight (MG4) is much smaller than the Elcan (M60). So much so that you can't even read the reticule numbers on the Trijicon.
Before someone can tell me I'm wrong - I've used both of these sights in real life for years - YES, the Trijicon sight is physically smaller. NO, it doesn't change the size of the reticule when you have proper sight picture.