Ed.: Farmboy is not from an area where Rugby or Aussie Rules Football is played very often, if ever in the course of 100 years. He has trouble, from the pictures, telling the players apart.
Farmboy, I think these are all Rugby players except for one. Can you tell which one? Even the shirtless players are Rugby, it seems.
Here's the key: Aussie Rules pro players all have an AFL patch on their shirt and on their shorts. That's an easy way to distinguish.