RR (700pgs) integrates phys, path, pathophys, epidemiology, biochem, etc. He actually explains concepts briefly and it is much more comprehensive, but it takes much more time to get through as a result. It also contains a lot of details (labs, etc) that are likely beyond the scope of Step 1.
Pathoma is probably the bare minimum you would want to know for path to score around average. The text (200pgs) is limited to mostly path with some basic explanations, but the videos provide more integrations and are a great change of pace from FA and practice questions.
I'm using RR as a reference in dedicated when I need explanations beyond FA, which basically has none. If I could start M2 over again, I would use RR throughout the year alongside classes & as my primary review book in dedicated, and I would only use FA for topics not in RR.
Best advice: Keep asking around about resources like you're doing and learn as much as you can, glance at copies at the bookstore/library, and figure out which ones will fit with your learning style. If you have a solid plan going into M2, it's a lot easier to set on cruise and ignore all of the noise.