Looks like you do lose a few things if you go with the standard 8.4 instead of the 8.4 Nav. (HD Radio, 3D city/terrain, SXM Traffic/Travel Link, and an extra 6 months of Uconnect Access). None of it seems earth shattering.
Uconnect® | The right Uconnect® for your Chrysler Vehicle
Uconnect® | The right Uconnect® for your Chrysler Vehicle