A:
The RF217ACPN/XAA is merely an internal inventory code; this model actually is the RF217ACPN...there is no difference. What you're probably seeing are subtle differences between the websites due to rounding (20 cubic feet is simply 19.8 rounded up) and semantics (digital vs. electric). The RF217ACPN's capacity is 19.8 cubic feet, and this unit features digital temperature controls, Samsung's signature Twin Cooling System to help keep food fresh longer, EZ Open Freezer Drawer Handle, an automatic icemaker in the freezer, and LED lighting.
I hope this helps to clarify!
Ms. Samsung