How do auskin pelts compare to ecowool?

I am buying a skin for my 15 month old son to sleep on, and potentially one for my own bed. Ecowool is about four times as expensive as the auskin rugs that they are selling at Costco. I don't know what chemicals Auskin uses to tan their skins, I know Ecowool uses "natural" things. . .I think even organic.

Has anyone compared the two? Is it wort the money to buy an Ecowool rug?

I recognize this as a purchase that will last a lifetime, so I am willing to save up and dole out the extra cash if it will truly be worth it.