I don't own one, but I've heard the biggest difference is in the hardware and pickups. I've also heard bad stories about the Mexican wiring. Plus the American gives you that extra fret if you reach that high.
i asked if the standard series are the mexican models (thanks misleadtheworld, i thought so) not if the american series are. i know for a fact they are not the same, that would just be dumb.
I was only trying to describe the difference between the Mexican ("Standard") and American ("American Standard") series. Guess I wasn't clear about it.