Steve - In my opinion, the ones from your collection are good. But there are differences between these and the questioned one. I don't like to get too specific when pointing out a forgers issues -- not sure if this one is still active. But in the questioned example and the ones I posted, check the curvature of the hump in M and the smallness of the second hump of the M vs the first hump. This is just one atypical trait.
I agree with you. I am actually posting these to give some more examples of those that are without question good. The only one I see that looks similar to the M you mentioned is the second one I believe which is on a 16x20 with Brooks Robinson.