I'd pick it based on which gift would get the most use, and garner the most appreciation from your brother. If he's a more formal, dress up kind of guy, then the Alpinist. If he's a less formal, dress down kind of guy, then the Airman. Into watches and familiar with the "mystique" surrounding the Alpinist, go Seiko. Outdoorsy, military, or a need for the GMT function, go Glycine. I need a brother like you!