I'm not even sure why you think these products are comparable. The Tin Audio headphones can't even make phone calls and don't even have an inline remote. They are basically dumb drivers. If that's what you are looking for then rad, you have the right thing, but that's not what Airpods are.

The big reason people like the AirPods is because they don't have cables which is a huge convenience. They also let you make phone calls, dictate text messages, and control your phone (and anything controllable by your phone via voice interaction) by voice. If none of this appeals to you and you don't mind the cables, fabulous, but don't pretend the two products are comparable.

Also the base AirPods are $139, not $250.