Based on the UOA I have seen they are usually thicker (because some of them burn oil), with more seal conditioner (because some of them burn oil), with more detergent (because they likely have more carbon build up at the ring pack, and out of warranty so emission system poisoning lawsuit threat is less likely), and slightly less fuel efficient if the engine didn't blow by or burn oil (thicker, to compensate for ring pack carbon build up and oil leak through seals, takes more energy to pump thicker oil, etc).
If you don't care as much about fuel efficiency they are actually a good oil to use on newer car too.
