From my personal experience they are priced cheaper for all rides. But rarely that much cheaper - perhaps a surge time?

The variable that differs is time to pickup. I've found Waymo is generally pretty good for me in off-peak times - perhaps on average 2-3 minutes further away on average. But I have got the odd "20 minutes away" and I then just order an Uber.

But I will always pick a Waymo over an Uber if they are the same distance away. I love playing my own music and just being in my own world without another human to consider. It is truly a relaxing commute.