Hello guys, during the past several years I have flown alot on United, but only had 2 segments on US Airways - both under 2 hours - both on coach. I am thinking about trying out US Airways again on my next cross continental flight (from California to DC).

Does US Airways give any type of privilege to a star alliance gold card holder? (United Premier Exec) - what are they? United gives me free economy plus access on flights that have them, what does US Airways offer so a United flyer like me will be convinced to try US Airways on my next flight?
(without considering flight schedules)

Thanks,
-j