There is no technical difference between a standard fob and a keysense fob. Only the pretty plaque on the rear of the key which is to help the owner identify it as the keysense key.
This is not an accurate statement. The part numbers for the standard fob and keysense fob are different. The keysense fob is preprogrammed to transmit a unique signal that uconnect interprets as belonging to a keysense fob and applies the predefined restrictions to the van. That is a technical difference. The don't think a dealer can convert a standard fob to a keysense fob.
2017 Pacifica Limited (built May 2016)
Vacuum delete, KeySense and Tow