There would be little in it, both are what i will call second option cards. Personally i would have a preference towards one of the better makers such as XFX/ Asus/ MSI to name a few.
I guess you need to look at the cards and see if there are differences or are they both reference cards. Usually one of the cards will have third party cooling or something in the bundle that the other is missing to sway the decision.
there is always of course good old price to take into account as well.