Ok.
Curt's website lists model #13081 - the one in that eBay listing - as being for 2011+ while model #13548 is listed for 2007-2010.
Again, I don't know what the difference is - from the pictures it appears the holes to the rear in the mounting plates are elongated in the 13081 model and not in the 13548 model... but the 13548 model is more expensive for whatever reason.
Regardless - thanks for the info.