How does the college board PSAT practice test compare to the PSAT/NMSQT?
My understanding is that the practice tests are just previously released PSAT tests.
I felt that the college board one was pretty similar. Ones that I had taken through kaplan and/or other study sites were often harder or had more advanced math content. For example, the last practice test I took before the PSAT, I got a 1280, but on test day, I scored a 1490. This may be due to my testing environment, but that is a pretty substantial jump to me.