The other part is noise-cancelation, which removes background sounds so you might better hear your music.
And this seems to have gotten a serious upgrade in the new AirPods Pro.
Apple says the noise cancellation is “2x” better, which is a pretty meaningless number.

Apple
The sound waves cancel each other out, and you get reduced noise.
Transparency mode is one of the best features of the original AirPods Pro, so this is great news.
A Lost Case
The other obvious improvement is the charging case.

Apple
You also get longer battery life.
Bluetooth 5.3
This is the big feature that makes all kinds of great things possible.
Bluetooth 5.3 is the latest spec and is also available in the iPhone 14.

Apple
This means lower battery drain and better audio quality.
BT LE audio also allows simultaneous connections between devices.
One use for this is to broadcast to many pairs of headphones.
Unfortunately, the only iDevice currently supporting Bluetooth 5.3 is the iPhone 14.
Previous iPhones, including the 13, topped out at Bluetooth 5.0.
Finally, one “new” feature is also available on your existing AirPods Pro.
It’s remarkably good on the original Pros.
This scan also informs theAdaptive EQto better adjust regular audio.
But are they worth an instant replacement?
Unless you also have an iPhone 14 with Bluetooth 5.3 to pair with it, then perhaps not.