Probably comes standard with the trailer sway controller or some other feature that enhances the towing, that is only an option on the Sport. If I had to guess.
You can see the power port in the modified Gladiator pics, tucked in behind the Decked boxes. Looks like may take some fiddling to use it if you add the Decked.
Only works for a stepside bed, or one with a built in notch. They stick out waaaaaay too far otherwise. I'm trying to figure out how to mount a side mounted 37x12.50 on my Thriftside J2000, and it ain't easy.
Jeep's design team already said they were never going to use the FSJ style front clip again on any concepts, as they didn't want anybody to get their hopes up as it was never going to be a production front end(they got them from that aftermarket company that does them for JKs). I guess we'll see...