I have a feeling the salesman is pushing the aftermarket unit because he's been told, from his service guys, that the factory remote start isn't available....
Here's what I've heard... Don't know how true it is or not....
Factory remote start can not be added by a dealer because the parts aren't available for '13+ MY..
Even if factory remote start can be added, it can not be activated with the Witech, because Chrysler has to add the option to the VIN 1st. You have to find someone at Chrysler willing to add the option, to the VIN, so the Witech can activate it on the truck, after it's installed....
Basically, it's a huge hassle, for a dealer, to added the option after it's fact the plant..... Where most dealers can't do it because the parts not available and/or, it's near impossible to activate after it's installed...