The choice of genre is not very varied (SW2 and Superhot are pretty similar, Firewatch is rather niche, all three are FP 3D games), but in terms of quality, they're all good games.
Considering many GOG users are collectors and shopping addicts though, here's a pretty simple calculation: SW2 is by far the most expensive and least discounted game of the bunch and (contrary to at least Superhot) hasn't made an appearance in a bundle yet. Not exactly fair conditions for the other two. Anyway, I certainly wouldn't complain if SW2 wins since it's the only game I don't own yet, for the reasons mentioned above. ;)