Take a good look at your sub frame and the rear cross member. Take pics and/or video camera. Go down to the shop and compare both subframes visually.
I say go to the shop and compare because sometimes those shops don't know what they are selling.
It's hard to go by diagrams sometimes because, sometimes they use the same pic/diagram and just label it with part #'s different.
** Auto vs Manual, subframe and/or rear cross member could be different for these also.