Afaik the only manufacturer that currently offers heated and cooled seats is Volvo. And it's a rare option, even on top spec o/o VNL780 models. Everyone else offers butt warming only, and even that's rare.
I expect that trophy trucks with leather seats are exempt from having FedEx seats, since I really don't think FedEx would pay for a handful of leather seat covers for trophy trucks.
I wouldn't be so sure about that... Same seat in all new (road) trucks, for the past several years. I've not noticed the city unit seats, so I can't be certain on them.
Same branded stitching on the leather & cloth...