I have a pretty big collection of headphones and IEMs. I bought the APP1 for transparency mode. It works great for doing chores, walking the dog, errands and so forth. The sound was pretty vanilla with a distinct lack of bass and sub-bass. They were basically lackluster across the whole frequency range. Not bad, just not exciting at all.
The APP2 is similar. The sound signature is absolutely improved. These are tuned better across the range. They have a fair amount of bass and some noticeable sub-bass as well. The mids are reasonably saturated and the highs are bright without being too cutting.
My primary problem with them remains from the APP1: the fit. These fit better, but I still struggle to get a decent seal on my left ear. The L tips are about 1/2mm too small to work reliably in my ear(s.) It appears that Apple very slightly altered the case so that they feel more secure, so that’s a bonus.
The ANC and transparency modes are great. This is what I come to AirPods Pro for and the 2.0 version doesn’t disappoint. They are significantly better at eliminating ambient noise, do a fair job of stifling moderately loud noises and a pretty good job of dulling down loud sounds, particularly with active transparency.
So I’d characterize these as a definite upgrade from the originals. They fit better, sound better, reject noise better and (from specs, not experience yet) have a more robust battery. Apple still has a ways to go before these compete with wired IEMS at a fraction of the price (and some of the TWS buds as well) but these are a serious step in the right direction.
Oh, and spatial audio seems like a gimmick to me. I’ve only come across a handful of tracks that sound good with it. It sounds better on these but I still think it’s way over processed.