I have an opportunity to pick up an adult proven Pastel. There are two to choose from one being lighter than the other. I hear alot about Pastels browning out with age and so I assume they all do to some extent. Can anyone post pictures of what is considered good coloration for an adult pastel (1400+ gm)? If you have comparative pictures of a good example and an (OK or Meh) example that you can post side by side, that would be extremely helpful. Thanks