Compare it to what I personally call Billy the Kid syndrome. In the 1973 movie Pat Garrett and Billy the Kid, which is still my all time favorite western movie :D, the actor who played Billy the Kid was way too old for the part. Kris Kristofferson, Nick calls him Forehead, however played the part extremely well. He was charismatic, dangerous and smooth as fuck.
Billy the 'Kid' is on the left. Plus it also has the single best Pat Garrett you could ask for, absolutely nobody can ever top James Coburn.
Now compared to a movie Nick showed me called Young Guns, it had a faithfully aged Billy the Kid but that movie was beyond forgettable for me. That actor didn't hold a candle to Forehead.