Honestly, if you have those already I think you should be fine. From what I understand there's maybe a few more tests in Math Destroyer (17 Tests in the 2016 version) and maybe a few extra questions in GChem/OChem/Bio. I would probably use the 2012...it doesn't seem that old 😛 only 4 years. but if you think those extra questions would help you definitely go for it. You can't go wrong with the Destroyer books 😉 They're super super helpful!