Use both. UNless you feel that Physics is a strong topic for you. The 1001 questions are just science questions, no mcat format. Meant to drill in the science concepts. Well, there are some "passage" based questions, but they are not meant to be mcat style.
I absolutely loved their 1001 series. It systematically takes through different topics and lets you figure out on your own the topics you do not understand or do not know. I was able to figure out how to solve projectile motion stuff in this book by myself.