He does look similar to a gold duck wing araucana, color wise... A young one at least. But, he doesn't have the gold coming in over the back in the saddle... how old? Also, we don't have a partridge wing as a color.
Here's a page for our SOP colors...
http://www.araucana.net/sop/
if its a cross, then its an EE. I have an ameraucana crossed to araucana... she's an ee.
I didn't know that UK SOP araucana had the lethal gene... which is associated with the tufts on ours... as apposed to muffs.