I was told that they're both the same, that they merged in the late 90's. I don't know if it's a rumor or not. I have clymers for 2 Mercs and 2 Evinrudes. They aren't bad, although sometimes what you need to find out isn't where you'd think. It sometimes takes some digging into. That can be a little frustrating while you're elbow deep into a motor
The wiring diagrams have been dead accurate though.