Pricing

I'm willing to bet they are the same if not damn near the same minus the center console to the 15's.

 

Same here, but I'm not about to buy the 15's to find out. lol

 

But what about the door sills themselves (without the carpet or all weather matts)? Are they worth paying for the upgrade?

There doesn't seem to be a price difference on the mats/sills between the AC and DC cabs. The DC would require larger mats and sills, right?

 

Also are the sills at least aluminum or something? Or are they just plastic?

 

I almost leased a '15 several months back (but didn't as the '16s were on the horizon). In our lease talks, a 24 month lease held a 79% residual value. I imagine that a similar RV/number will be present for the '16s.
In short, the residual value is great (just as after purchase).