I have never had an issue price matching at frys (except for microcenter cpu but see below) if the model number is the same. Backplates on evga cards are mostly cosmetic but supposedly help cool the board. Asus actually uses theirs to support it since they dont have a bracket running along the pcb like some evga or msi cards, etc. The dual bios is nice too but also not worth it if there is a price difference, in your case why not get it, i would get the backplate over dual bios though.
Keep in mind some of the evga boxes say they offer a backplate or something like that but you gotta get it mailed by evga. If its an old box I dont think the promo is current, but a OCN member here got them to honor it since it was printed on the box without a visible expiration date.
A tip for frys though, if your ok eating the cost, buy it then get the refund at customer service later on mentioning it was cheaper online. The department managers can be a pain sometimes but the customer service desk are not as picky as long as its the same model number.
NCIX us has will call if your local...just make sure its in stock at their CA location
sometimes it says instock but its another state.