Just guessing from the model numbers, they probably perform about the same. One bump in frequency between them, with the same one bump in CL timings. If you need the faster speed of the first set because you are OCing, then get the first set. Otherwise, get whichever is cheaper/the second set. Do you really need 32GBs? Win7 HP only goes up to 16GBs, so make sure you can really use what you are buying.