from my personal experience of feeding NV and primal, i also noticed that NV has larger pieces of bone, because milu always spit them out. LOL. (she would chew on it a little first then spit them out)
also, the NV raw seem to more watery and primal seems to be more sticky in consistency.
i was told by the people at the shop that primal has more vegetables then NV. i never checked and compared the ingredient list, so i can't say for sure. but primal does have more of a green color then NV.
milu is eating primal right now, i give her beef, duck and chicken...and she has 7 bags of kibbles...
