I'll be very interested to try these. I've used both previous AirPods Pro revisions extensively but have had to buy foam tips from a 3rd party because the Apple silicon ones weirdly irritate my ears. They're not even uncomfortable, but for some reason after wearing them for a few hours my ears get really irritated and the skin will even start peeling a bit.
Not sure if it's because of the lack of breathability of the silicone, something chemical (although I never had issues with silicone earbuds in the past), or some kind of friction thing (seems really unlikely). Whichever, maybe this new material won't do it to my ears. I sure hope not, I'd love to not have to bother with 3rd party tips.
I'm also really interested to see the new fit. My significant other has been trying to use some AirPods Pro to do a hearing thing, but they cause a lot of ear pain after a while, and after looking closely it seems the problem isn't that the tips don't fit, but that when seated correctly the back side of the AirPod presses against the cartilage on the rear of the ear. With my ear shape the back side is nowhere near any skin, and I'm guessing this isn't a common problem, but if the new design either puts the body of the AirPod at a different angle or is just shallower, it might end up being much more comfortable.