i personally would go for the chetlers because i have a fat-ski fetish, but i think the blog is gonna perform excellent everywhere while the bentchetler is gonna be a more specific powder tool....
also, tell us a bit more about your riding?
i personally almost never ski groomers, even when the snow is bad, i stick to the trees and backcountry
so i'd suggest the blog if you don't have an allround ski yet, otherwise if you already have a ski with 100+waist i'd suggest the chetlers....