How many cruise autonomous vehicles are operating in SF versus Waymo's?

It seems that Cruise is involved in incidents every week while waymo is doing mostly fine?

Although the news coverage often lump them both into the same group, reporting that Yet another incident involving autonomous vehicles today...

Just wondering if maybe Waymo's tech is better or if they are just running at a much smaller scale.

I was in SF recently and saw both brands on the streets in equal numbers (once each).