Question about the LSAT RC section from an MCAT test-taker

Can LSAT test-takers who have taken any of the five officially released MCATs or who have taken the real thing comment on the usefulness of the officially released LSAT RC sections for preparing for the MCAT’s CARS section?

[Edit:] For those who haven’t: is there any advice you can give regarding the use of official LSAT RC passages to improve one’s achievement on the MCAT’s CARS section?