They are not two different models - in practice it is the same smartphone, or Nokia 3.1, which was prepared for two different US mobile operators. The one with the note A will go to AT & T on June 10, and the one with C will appear in the Cricket Wireless offer four days later.
It is a model from a lower shelf, with a 5.45-inch HD+ screen, Qualcomm Snapdragon 429 processor, 3 GB of RAM and 32 GB of internal memory. The whole is powered by a 2900 mAh battery. Details can be found on the phone card on the GSMchoice website.