One of the main differences, which may or may not be a big deal for you is that Primal foods contain 100% certified organic fruits, vegetables, and supplements in ALL of their formulas. Whereas in NV, the organic component is ONLY present in their
Organic Chicken Formula where BOTH the meat AND the fruits/veg/supps are organic.
Note that there is NO organic meat choice in Primal's product line. Primal describes their meat as: "human-grade, antibiotic- and steroid-free meats".
I have fed both NV and Primal as well as an AZ raw brand. I'm now feeding Primal.
[I do not like NV's rabbit as they source their rabbit in China, btw. Just my opinion.]