Different models of Macbook Air M2

The variations of which I am aware are:

• 13" vs. 15" screen
• RAM: 8 GB, 16 GB, or 24 GB
• Internal SSD space: 256 GB, 512 GB, 1 TB, or 2 TB
• Number of GPU cores: 8 or 10 (on 13" models); 10 (on 15" models)

MacBook Air (M2, 2022) - Technical Specifications - Apple Support

MacBook Air (15-inch, M2, 2023) - Technical Specifications - Apple Support

You can get a M2 MacBook Air to tell you a lot about itself by going into  > About This Mac, or into Option- > System Information…

There are also presumably country and regional variants for things like keyboards and bundled power bricks. For instance, the Technical Specifications mention "U.S." and "ISO" keyboards. The power adapters shipped for, say, the U.K., would presumably have different plugs than those shipped for the U.S.

Note that M3 MacBook Airs are out. Apple no longer sells new 15" M2 MacBook Airs, and is only selling new 13" ones as "price point" models.

Start at: Identify your MacBook Air model - Apple Support

You could try here: MacBook Air - Compare Models - Apple