Okay... I see your choices are limited. With that said, there is little difference between 1333 & 1600. I would go with the RAM with the lowest voltage & timings out of the Corsair & G.SKILL. If equal, I would get the cheapest.
My concern:I may be wrong...but I read somewhere that there can be a problem with 1600mhz....I thought am3 board only handle 1333....like you have to underclock it to 1333 or so to make it stable. .Not sure on the specifics. Just trying to get the safest option with my mobo that's all.