The "medicine" part is pretty much the same... no matter what level of medicine you're at. What changes is your understanding of it... I had a prior bachelors in Sports Med, got into Paramedic. After SM, medic was EASY. Nursing School was a slightly different beast.
As described, it was quite broad because they were training you to be a generalist. Not a huge depth in any subject, but definitely broad-based. Most of my prior education was medical model. Something's broke, you determine what broke, you fix what's broke and the body will heal. Nursing is almost opposite that. You almost don't need to know exactly what broke but you learn how to support the body's systems so the body will basically heal itself. The other issue is that you do need to know how things fit together and how truly the body is interconnected. That's where nursing gets to be different. That's also where I had my struggles. Medics are specialists. I had a very deep knowledge of the medicine part of stuff... but learning the CNA stuff really is the basics of nursing and is often given way less respect than is deserved. Nursing school became relatively easy once I began making the connections... It's not seeing the forest, it's more like seeing how the trees interact with the squirrels, birds, dirt...
Oh, and by the way, I passed the NCLEX at 75.