Is the LSAT Arguments Harder?

I think the LSAT questions are actually pretty good. I took the one online and I'm convinced it's a good way to practice. They're not that hard. Most are about as tough as the hardest CR on the real GMAT....maybe even a little easier. I saw two really tough ones at the end (I winded up getting a 36 on the verbal 85% on my first try and I'm gearing up for my second). Anyway, why do PR and Kaplan CR when you can do ETS CR questions, assuming you finished the OG. I just bought the 10more real LSAT book yesterday so I can start practicing. It's really good for RC too. Only thing is the LSAT gives you much less time 1.4min per as opposed to 1.9min per. So don't get too discouraged if you don't finish in the alloted time.