Quite different.
For example,
A Cross-post creates a new post under your name that has a link to my post with a short description you can add to explain. Then whatever votes your "version" (just a link to the original) gets on it will be split between curators like normal (50%). Of the remaining 50% I would get 90%, you would get 5% and the community you posted to would get 5%.
It is going to take some development to get it right, but it is worth the experiment I think.