Dodge has A/C seats, heated wheel, heated rear seats as well. Dodge uses Uconnect which is very similar to Fords Sync set-up. So you get Nav,Mp3, USB port, satellite radio and more. As for GMC OnStar had 2 trucks with it before never used it stopped paying for the subscription as well, be useful if a vehicle got stollen but never had that. The Dodge Longhorn uses a different leather that is top notch, actually had a tag on my seat explaining about were the leather had come from and the unique pattern and stress each seat has. All nice trucks tho some people find different thing important and have different taste, all three offer luxury heavy dutys I'd have no problem driving any of them.
What package/option? I couldn't find those options on the Dodge Ram site.