BRS Question Difficulty

I was curious if anyone has experience with doing the BRS questions. How do they to step 1? (I would ask how they compare to school examination, but I guess that depends on the program). Are BRS easier, the same, or harder than the general Step 1 question? I'm trying to get a reference for how I'm doing. I've been scoring between 67-80% depending on the chapter. Just trying to gauge how good, average, or bad that is.
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums