Setting a different default layout for POSTS?

[netarc]

I know in the Genesis framework one can set the default layout for posts/page content (Genesis > Theme Settings); I've set mine to "content-sidebar". And when creating individual pages/posts, I see you can override the default layout by selecting a specific one.

Is it possible, though, to have the default layout for POSTS be different than other content? e.g., I would like to use "content-sidebar" as the default layout, but for POSTS I'd like the default to be "full width content" without having to modify this for each post I create.

Thanks for any advice!