How can I know if these AirPods are original?

Counterfeits can be extremely hard to distinguish - even in a side-by-side comparison.

There’s no way we can assess it online.

Known legit serial numbers can be counterfeited.

If having a genuine product is an important criteria, it must be purchased from Apple - or an authorized reseller - and it’s tamper evident seals broken by the purchaser.

I guess they can be just a different batch of the box cause my AirPods Pro 2nd Gen looks completely different on the back on the box. But inside all looks legit to me, check the serial number Find the serial number of your AirPods – Apple Support (UK)

Then visit this page so you can enter Serial number of your AirPods Check Your Service and Support Coverage - Apple Support

Hello alikarim7,

Thank you for reaching out to Apple Support Communities, and we'll be happy to help in any way we can. We understand you have questions about your AirPods being legitimate. You can check the serial number to view the product information here: Check Your Service and Support Coverage - Apple Support

We hope this helps.

Cheers!

The only way to know for sure is to buy them from Apple or an authorized Apple seller. There is no way other way to be positive. If they were not purchased from an Authorized site, then it is very likely they are counterfeit. You may find that the counterfeit AirPods will have a lower quality, Find My may not work, or Noise Cancellation will work poorly, if at all. They also will not be covered by any warranty.