I bought the Pixel Buds A Series shortly after they came out (I got them as a deal with a Pixel 6 phone) and they immediately lent themselves to a particular use-case - housework! Because they have no cable to get in the way, you can dive around doing things around the house without them ever getting in the way - except that is when they occasionally fall out... These rarely leave the house, except when I am doing gardening or washing the car, due to the fact they let all external sounds into your ears. So if you're near traffic they're hopeless. They're also hopeless to use in a noisy office situation. I'm very happy with them, but you need to know what they do and don't do. Battery life seemed fine and my top tip is if you're wearing them, put the case in your pocket always!
A year later, I bought the Pixel Buds Pro in the sale. I wanted to try to use the noise cancelling feature in the office, as I was finding the background noise distracting after 2 years working from home during the pandemic.
The noise cancelling feature is amazing, and combines with the fact that these are a snug fit and shut out all external sound - quite different to the A series. They're also more comfortable and never fall out.
I tried a video call in the office with background noise, but others on the call complained that there was too much background noise coming through the microphones (using Google Meet with background noise filter enabled), so I had to give up with that use-case unfortunately. They do work well on a video call with low background noise however.
So in short, both are highly recommended, but they're good at different things.
Pixel Buds A Series