> Is this because Tesla has more training data?

Its human takes over. FSD is still Level 3.

(Robotaxi, Tesla's Level 4 product, is still in beta. Based on reports, its humans had to intervene.)

FSD is level 2. Level 3 doesn't require the human driver to monitor the outside environment, only take over when requested. Tesla also doesn't report data from FSD under L3 reporting requirements anywhere in the US.