The computer delivers more than 40 times the processing power of the previous system, running an Tesla-developed neural net for vision, sonar, and radar processing
Every customer of Nvidia's solution "develops their own neural net" by feeding their own set of sensor data into Nvidia's training platform, then using the resulting neural net on Nvidia's hardware in the cars. Did Tesla not do that, the same way Audi did here, and Nvidia themselves did for BB8? Everyone's going to be adding some software on top of that for the UI and UX they want to offer and such. Did Tesla do more than that? Your quote doesn't actually suggest they did.
The neural net is 99% of the work - if all they share is a particular GPU model, but each have "their own" neural net made on their own training data, then you can pretty much treat it as a completely separate, different system.
The quality and performance of the system is mostly determined by the data, not the raw computing power, so it's worth comparing them as they can be very different.
