I was reading this blog post over on the Klipsch blog and came across a bit that totally explains the difference between AirPods and AirPod Pros. One seems to be an earbud while the other qualifies as an earphone.
Earbuds are usually plastic and one-size-fits-all. Depending on the shape of your ears, these features can have an unstable, uncomfortable fit. For this reason, they can fall out frequently, especially during exercise. Since earbuds rest on the outside of your ear canal, they let in more ambient noise.
Earphones go past your concha and extend into your ear canal, thanks to silicone tips attached to the earphones themselves. This design creates optimal noise isolation, allowing you to enjoy your music more clearly and at a lower volume. It also makes your earphones less likely to fall out of your ears compared to earbuds. Plus, most earphone packages offer different size tips to ensure you get the best, most comfortable fit possible.
The Klipsch Blog
I have been using the AirPods Pro from the day they were launched and they have become essentially my go-to audio device. I use the Pros for Zoom calls. And even when traveling on the plane, they are pretty handy, and their noise-cancellation capabilities make them good enough for me to leave my old Bose 35s behind, especially when taking short-haul flights to say Los Angeles or Seattle. For longer flights though, I find the Bose are more comfortable to wear, as after a few hours the in-ear phones start to hurt a little.