I think they are the same. I'd contact the Nissan dealership to make sure. I have much of the service work done at our favorite Nissan dealership since the parts for most items are identical. The only thing I'm going to the Infiniti dealership now is warranty work and items specific to the JX. Nissan is much cheaper for having the vehicle serviced.
If our Infiniti dealership would stop terminating my favorite staff members I might be tempted to have them service the car. Can't figure out what the heck is going on down there.