Fedexidor

I have 4 2016 Nissan NV2500s all with blown engines(thrown Rods). They all lasted for over 300,000 miles. My question is what is the difference between the 4.0 out of the frontier or extra and the one in the NV2500? The forth digit of the VIN on my vehicles is a B, can I swap the motor out of a vehicle with the forth letter being an A?