Love the new lumed bezel and how they ditched the rubber parts on the crown and case with the new S2. The bracelet really is amazingly good, though it better be for the absurd price, and while I'm sad the text around the bezel is gone the simpler finishing probably makes for a more hard wearing/easier to refinish piece. As always with the previous S, the GF in house balance wheel is imho the best finished balance wheel anywhere so seeing it on display is a great thing. The gears are all beautifully cut and polished and in particular I like that the new smaller S2 has cut away some of the dial so you get a peak at a next level of perfectly finished gears underneath which were covered in the larger S2. A minor thing that I think is an overlooked but bid differentiator is the water resistance without a screw down crown. A manual wind with a screw down crown is annoying and I'm not sure how long the seals will actually last when you have to screw and unscrew the crown every couple of days. Most of the competition in this space of manual wind sport watches like the De Bethune DB28 grand blue or the MB&F Evo watches have screw down crowns.
What most causes me to pause is some of the choices around finishing, architecture, and materials and that's seen most clearly when comparing the S2 to the Convexe GMT or the Double Balance. The titanium dial and movement plates probably help save weight but then the fine hand frosting had to go in favor of blasting because of the hardness of ti. Look at the frosting on the GMT and it makes me wonder what could have been. The Double balance also has a titanium dial but a wide polished edge has been applied where the dial drops off to show the movement below. Also, both the GMT and DB have full polished balance bridges vs the single arm of the S2, the GMT bridge in particular being really beautifully done with multiple facets and sharp breaks, the DB bridges also nice but not executed to the same degree as the GMT or even as nice as the bridges in the classic cased renditions of the DB movement. I do see what looks like added shock protection for the balance wheels in the DB Convexe so that's something. Maybe the full bridge doesn't really add anything more to the accuracy or durability of the watch in "sporting" scenarios but at the same time it is interesting to note that the more expensive variants did go a different way. Finally, it's a thick watch. I know they need the height for the angled balance but I'd rather the watch was thinner and they go back to a "flat" balance.
Of course it isn't really fair to compare the S2 to the vastly more expensive other GMT and DB, and of course if you spend more you get more. But I think this is where the sports line breaks from the classic GF watches. With the Signature One, Balancier, and Balancier Contemporain which all came in similar to (or less than) the price of the S2, GF was still delivering all the fine finishing and beautiful architecture GF was known for, but you were getting less components, less complexity, no tourbillons or rotating globes etc, and in uniquely different (smaller) sized cases so clients really could choose their right watch and not feel short changed. With the S/S2 for the first time there's a compromise, maybe a needed one, between the amount of hand decoration and the everyday utility of the new titanium case, movement, and real world water resistance.