I didn't think there was going to be a tradeoff. There was never supposed to be. The idea that random people would drive others around was never part of Uber's business plan, that's why it was called "Uber" to begin with. It was never part of anyone's business plan—it was illegal.
Lyft came along and just started hiring random people with no passenger carrier permit and no insurance, and then Uber had to compete with that nonsense and that nonsense somehow just became legal because "it's an app" was a valid defense and the CPUC went along with it because it became too big to ignore or outright ban.
> It's just a random guy with a more expensive car.
The big one is they are required to be commercially registered and commercially insured. At least here in Chicago it's usually the private chauffeur's with a livery license plate in sedan/limo. I'm guessing they do Uber black on the side.
Anyway, yes they are "just random guys" just like any other Uber driver but they've had to jump through extra hoops which affects who does it. I'm not saying that causes a better selection but there is specific difference between the two, other than just requiring a better car.