Does anyone know what's going on inside the White House in terms of who is working on these drafts and why the first differs so drastically from the second?

We have no reporting on this, only these "leaked" drafts.

The two drafts differ substantially. I don't see how the difference has much to do with the immigration order debacle. That certainly happened in the meanwhile but if anything it seems the second draft has changed to reflect the confirmation of new "agency heads".

The second is noticeably less ambitious too. It's written as if to have little to no effect whatsoever on the status quo.