Heh, I don't know a lot about other species of clowns (other than gold stripe maroons) but they pretty much behave/grow/act the same way.
Sometimes clowns will move and host different spots of the tank.
Let me post this to the mentors and see if some one can answer your question better than me.
Age is relative, you are only as old as you act....of course, this works in reverse....
Different clown species should not be housed together unless the tank is very large. What you are seeing is your much larger and more aggressive Cinnamon clown harassing the smaller more docile O. Clown. Eventually the Cinnamon will kill off the O. Clown. Cinnamon, Tomato, GSM, and a few other clowns are very aggressive and will harass to the point of death other fish. My suggestion is to remove one or the other.