After trying the latest Tesla FSD, I nearly crashed a Rivian R2

No I don't work for Tesla. I don't even own one. I rented a brand new Model 3 FSD for a road trip this week and was blown away at how well it works now considering I last tried FSD years ago on a Model S and it worked decently at best. This new one was pretty much point to point and outside of some lane suggestion input from me, I left it alone and let it drive me for 3 hours.

Today I decided to try Rivian R2's Autonomy+ and nearly crashed it. Mind you, I have never driven a Rivian and did not read about Autonomy+, which is my fault. I hopped in, got familiar and then tried Autonomy+. Then to my surprise, it was barreling towards a 4-way stop intersection at mach 3 before I stood on the brakes.

I don't follow closely autonomous driving development. Does anyone else make an FSD like Tesla's or are they actually that much further ahead?