"Should", remember what your Dad told you about that whole idea?
Yeah, well something else I almost mentioned above is the "detent". Sometimes the plug may not be fully inserted when you feel a false "detent", sometimes you can push the plug in "too far" also. Those factors are less noticeable with fewer segments on the plug shaft.
I'm glad you were able to try them both out fairly soon and easily. Buying things online will never replace going to places where you can see, touch, and try stuff out.