Indeed, it seems the ratio of fatalities for rail/cars is around 1:25 in EU (see above) and 1:10 in USA [0].
Comparing those data, driving is also much safer in the EU: death rate per 100M passenger for cars in 2021: 0.57. Multiply par 10 (100M to 1B) and divide by 1.6 (miles to km) = 3.5625. Rate in EU = 2.52.
Your right to point out those numbers aren’t split by driving assist options. Until that (still imaginary) future with +95% AV it seems hard to beat that 1:10 ratio, even more with vehicles weight steadily increase [1]
[0] https://injuryfacts.nsc.org/home-and-community/safety-topics...
[1] https://www.epa.gov/automotive-trends/explore-automotive-tre... (select « weight » then « cars » for regulatory class and vehicle type)