A Marshaln-style Guessing Game

I've been meaning to do a post comparing various kinds of sheng pu'er teas and shu pu'er teas.

Marshaln, master of tea guessing games, has suggested I ask you to identify these five teas based on the appearance of the dry leaves.

The five teas below are:
  • Young sheng
  • Young shu
  • 90s sheng, dry stored
  • 90s shu, wet stored
  • 90s sheng, wet stored
Which are which? Comment with your answers and, if you like, give your reasoning.

Five kinds of pu'er
(click photo for large view)