I know it’s a well-worn topic but it comes up often. I can’t speak to that particular NATO, but I’ve owned a few Omega NATOs and even more non-OEM ones, including some that cost a few dollars.
The Omega ones are certainly good quality, but you are 100% paying for branding. By no conscionable reasoning are they worth hundreds of dollars. I’d frankly be surprised if they cost more than $0.30 to produce. They’re a good thing to ask a dealer/boutique for as a throw-in gift or as a gesture after a problematic experience. But paying retail for one is silly, imo. The cheap Amazon one will function just as well, feel nearly as good (I mean, it’s a NATO), and you can treat yourself to 10 of them for the half the price of one OEM.
To your question, the metal bits appear to have different finishes too. Guess it’s way more expensive to brush than polish? 😀