I cannot tell you the difference in those model levels you seek info on... but I will caution you on a somewhat unrelated issue with the Pacifica. Not that a working phone or navigation/maps thru your phone is a MUST in your decision... but I would simply suggest, when you go for your test drives, whatever model you land on, BEFORE you buy, bring your own cell phone(s) you expect to use in the van. I am not an Apple guy... and to say I am (as well as countless others) are having a most difficult time getting a clear, acceptable answer as to why my Android phone will not trigger Android Auto to project the phone screen onto the UConnect screen as it is advertised it should, and the inability to use the full functionality of the talking/phone functions. I do not have unlimited funds to go purchasing the newest phone(s) or iPhone trap every year, when the Chrysler advertising states otherwise... Just bring your own phone, test it in a demo of the year & model you plan on purchasing - run it thru maps/navigation, try to MAKE a phone call via the steering wheel buttons. I didn't. I was told it would all work just fine. It is NOT, I cannot get a clear, acceptable answer or reason as to why... I would like to see you or others NOT go thru this same situation.