I did some research as I am a Sandfire investor as well........(if you recall I notified the CDU posters a long time ago that I was selling some of my CDU shares and putting the money into SFR), not without receiving a heap of crap and vitriol form some of the rampers of the time, and I thought that it was just right to share it with all posters still following these threads.
A very good comparison IMHO.
Re Sandfire and CDU
Not bad for a company which was categorised by some CDU rampers to go bust within 12 months as it was too deep in debts and not having/sufficient enough copper to make a profitable copper mine, where CDU was the bees knees of all Copper mines.