Barron's or Princeton Review?

So I’m taking SAT Chemistry subject test tomorrow and I’ve been studying from the Barron’s book because I heard it was the best – certainly better than PR.
I found a PR practice test online, though, and found that it was much harder (at least to me) than those in the Barron’s book! So if any of you have taken the SAT chem test, did you find PR or Barron’s to be better in preparing you for the actual test? Which prep book provides practice tests that are more comparable to the real thing?
Thanks!!

Whoops so sorry!! The category is totally wrong