One if much more expensive but they both have the same chipset. Is it worth it to get the more expensive one?
Cheaper one
More expensive one
The second one is def worth it.
Notice that often output power isnt all that interesting.
A proper antenna like a grid or yagi is what gets you some far away stable connections.
Both chipsets seem good enough , atheros beats almost anything.
I suggest you read some feedback on the chips and seek user experience.
Myself I have a bunch of alpha's and most of them just arnt stable, get hot or whatever.
Iam not claiming that all of them are.
Money is not really an issue so I dont really care much for trying.
Just make sure you are able to return broken ones, I returned 2 after dying.
Great for wifi cracking though.
Ubiquiti makes some killer adapters, those often cost a bit more though.
As for atheros , the ath9 and 8 driver support native mon mode and injection 95% , I love them.