>SuperCruise

That's also different technology afaik. I think GM maps various roads with lidar vehicles and then those maps get loaded into the vehicles for cross-referencing to their position -- done this way so they don't have to have a bunch of LIDAR units on the vehicle processing in real time. They likely have some forward facing LIDAR or Radar (or both) units.

Elon wants to be cheap and do it solely with cameras.