RN to BSN process vs BSN

Hi all,

(Backstory) I am currently a sophomore at my university. My school has a 2 year nursing program, I have a 3.5 GPA and I am currently passing my classes.. I am use to making A's and these C's are making me insecure. I feel as though my university is making our pre-requisites waaaaay more difficult than it should be. I had to take A&P II at a local technical college during the summer of 2018, and it was so amazing. The professors actually wanted you to understand, and they did everything possible to make sure that you did so. And I loved that hands on approach, compared to me asking questions and being told "Read the lab manual." Although I am so close to getting into nursing school at my university... I am over it. But I don't want my university to ruin nursing for me. If I transfer to another university, there's a chance that almost all of my sciences (A&P 1, Chem, Patho, & Micro) won't transfer. Our textbooks and courses were modified for and by my professors at my school. They told us that their classes most likely won't transfer to another school before starting classes, but I never imagined how lousy my professors would be.

(Question) Is there really a significant difference between going the RN to BSN route? Do you guys think it is easier than getting a BSN straight through? Are the RN and BSN NCLEX exams similar, or totally different (knowledge wise)? If I take additional classes over the summer, would I be back on track to graduate with my classmates (Spring 2021)?