It sounds like you have already been looking on the Board of Nursing Pages. If not, try a google search for both Board of Nursing for Scope of Practice. I took a quick look and you are right, it is not easily found. What you will need to do, as it sounds like you know, is contrast and compare.
Several years ago, when I graduated, I received a small booklet with small print on the NM Nursing Scope of Practice. My copy is long gone, sorry. Perhaps this is how they are still handling this information.
Good luck to you and let us know how you make out