Love the GF choice, definitely thinking the same! For The One, I needed decent wr and shock protection, non-pm but also refinishable like steel or titanium, lume, non-proprietary strap attachment, and running seconds. Since it's an everyday watch that will get a little beat up, I wanted all the bling and finishing on the inside the watch and little polish on the exterior. I went with the DB28....
It's been a great one watch, light, thin, beautiful. The GF S2 is tempting too. I didn't love the rubber inserts on the case in the previous version and I feared what I would do to the engraved bezel so this new release looks like a nice update.
For manual wind One Watch, I really like that the GF has the same water resistance without the screw down crown of the DB. Since both are manual wind, I worry a little about the longevity of the wr screwing and unscrewing the crown over time.