I pretty much say actually white tipped tail fan feathers = Merriams, anything else, buff, tan, etc, are Rio's or mixed in NE. WA. Eastern's, at least ime, usually have more rust or chesnutt colored secondary tail fan feathers and then the main tail fan feathers are either colored the same as the secondaries or can be lighter, more buff/tan.
I think your picture is of a Rio but no matter, every bird is a nice bird! Love me some turkeys!