Social Sciences CLEP and Peterson's practice tests.

[sklineho]

So I came up short on my TESC eval and they said I need one more free elective. I decided to take this CLEP as it's a subject I'm familiar with and good at. I decided to try the Peterson's practice tests and there is actually some somewhat obscure stuff on those. I looked over the Social Sciences thread here and saw little about Petersons so I figured I'd ask: are the Peterson's tests that much harder than the real CLEP? I'd still pass based on my Peterson's scores but is the real one as full of more obscure questions as the practice tests?