What is the differences between AirPods Pro(2nd generation) model and order numbers?

Hi, I'm going to buy AirPods Pro(2nd generation) and I've noticed that there are various model and order numbers on the market. I was wondering what is the differences between airpods' model and order numbers?

After I made a little research I found out that there are 3 different model numbers of AirPods Pro(2nd gen) which are A2931, A2699, A2698. What's the difference between them?

And also I saw there are at least 2 types of order numbers: MQD83TU/A, MQD83AM.

Can someone explain what are these numbers represent?