Here are my thoughts. I’m a big fan of the AirPods Pro 2. They do almost everything well, and I really like their tuning. It’s not perfect, but I’m not looking for perfect—I’ve got IEMs and headphones for critical listening. I’ve had the AirPods Pro 3 for three days now, and right off the bat, I don’t like the sound. They come across as bright and boomy, even harsh at times with a lot of the music I know well—and surprisingly, even with audiobooks. They also don't have the mid warmth I'm used to with the 2's. They are definitely a V shape, while the 2's are more of a U shape. (my take)
That said, the fit of the 3s is excellent—much more secure. Adaptive and Transparency mode feel basically the same, and ANC (which I don’t use much) does seem a touch better, maybe due to both tech improvements and the deeper nozzle insertion. I didn’t spend a ton of time comparing ANC, though.
Here’s my biggest takeaway: I almost returned the 3s today. The only reason I didn’t is because I cycle—a lot, both road and mountain. If you’ve used the 2s on a bike, you know wind noise is a problem. It’s not unbearable, but it can get annoying. Adaptive mode helps, but not enough. This is where the 3s shine—way less wind noise. A huge difference. I’m guessing that’s thanks to the deeper nozzle.
So, I’m keeping the 3s as my cycling buds. The heart rate sensor is a neat bonus, though honestly, I doubt I’ll check it much in the Health app. Still, it’s cool if you don’t wear an Apple Watch. Hopefully, Apple makes heart rate easier to view, maybe with a widget or Control Center option. If the APP3s sounded like the 2s, I’d happily retire the 2s. Maybe Apple will push out a firmware update to get them closer or provide an EQ option. Who knows?