The chart does not say it is using only electric models. How do you know that? It says per BRAND not per model.

Further down, the article includes deaths relative to sales volume for various EV models. I don't see how it is unfair to compare two EVs fatality rates.

Finally, while miles driven would be great I imagine it's hard to know the average miles driven per model, but there's little reason to think it differs by orders of magnitude.