What do you mean by that?
basically that the mts in the west are bigger. if you can ride blues or blacks in the midwest it doesn't necessarily meant you can ride them on bigger mountains.
there isn't anything in the midwest or east coast that looks like the black runs out here, but because there are resorts in the midwest and eastcoast they happen to label some of their runs 'blacks' - but their blacks are like our blues.
if you get to the point were you can ride black diamond runs at MT resorts you're probably going to be comfortable anywhere - i hear its pretty rocky out there.