There should be no perceptible difference in sound quality between airpods 1 and 2. Now the pros do have improved clarity and bass than gen 1/2 but it’s not jaw dropping by any means. But definitely noticeable. But then again sound is very subjective. There are people on the forum saying they hear no difference but many who do. Either way at the very least you will definitely hear more bass but it’s not overpowering