Okay, at it again.
PA education = 12-14 months of intense broadbased medical education, butt in seat, drinking knowledge from a firehose. You learn, and are tested, then learn some more, then tested again. It is almost entirely focused on medical education, with a small amount of "research methods" and public health thrown in. You probably average 30-35 hours of lecture/skills training a week, plus another 30-35 hours of study, and frequently 4-8 hours of beginning clinical rotations. Then you have 12-14 months of rotations that probably average 50-60 hours a week of work/learning. There are tests after each rotation. Mandatory rotations in surgery, emergency medicine, cardiology, womens health, family practice, psych, peds, and geriatrics. 2000 clinical hours as a provider-in-training is the minimum, with many exceeding 2500. PA education is so intense, packing so much education into 2-2.5 years that virtually nobody can possibly work during the program. This is standardized across every PA program in the country.
NP education = Nonstandardized, and can consist of 2 years of education that is often done on-line with a few trips to the classroom a year to do some skills testing. Much of this 2 years of education is advanced nursing management, advanced nursing leadership theory, advanced nursing research methods. Then 500 hours of "clinical rotations" that are often done at the same clinic. Rumor is there are some NP programs that have significantly increased their actual medical education, but I am not familiar with them. Most of the NPs I know, and current NP students, attended programs like I described.
I don't say this to demean nurses or NPs. It's just the facts.
Yes, the best person to enter a PA or NP program is someone with significant previous experience as a RN, medic, etc because they do have some experience with medications, procedures, organization systems, etc. However there is a VAST difference between being a RN/Medic and being a medical provider. One should not conflate experience as a RN/Medic with experience as a medical provider.
All that being said, PAs and NPs compete for the same jobs and mostly the same pay. So, if you're already a RN, then going the NP route is certainly the easiest and cheapest route (although with the implementation of the DNP it may become just as expensive as PA), so it's usually a no-brainer to go NP....unless you want the more in-depth education from PA program. Likewise, if you already have a non-nursing BS, then PA may be your cheapest and easiest route to go (vice attaining RN first, then NP).