I would get 3-3.5 hours on the 3 and get 4.5-5 on the 3a and I live in the sticks. My cell signal goes from poor to horror movie can't call the cops bad if I move an inch.
It's the worst modern phone I've used in the sunlight. It's visible, but barely. (this is like Texas sun, no clouds when it's really bad) It bothered me at first, but I work in an office. So I took a step back and figured this phone gives me 85% of what I want, so I'll not let the 15% bother me.
In your case, you like the software, camera, form factor, etc. Is the wireless charging and incredible screen worth it over the Pixel, or is that more the 15%? I've found that Pixels are greater than the sum of their parts. It's the totality of what it offers that makes me stick with one. Incredible camera, no bloat, quick software updates, what's playing near me, etc.
The 3a checks my most important boxes, even though it misses some things I like. When you add in the price, it makes it a keeper in my book.