I cannot speak to the V10 G2 specifically, but can attest that the SF-S is a wave magnet. It wants to run and will tell you its time to go. My favorite example of this is paddling into the waves in big swell with the sea wall reflecting waves coming at my back. Normally reflected waves are hard to jump on or make use of since they're against the primary swell and smaller than the primary swell. With the SF, i paddle along at medium pace and can easily feel when the reflected swell lines up right and says 'Time to Go'. I can ride the reflected swell into the waves and actually catch runs upwind.
The V10 G2 has such little rocker it would only make sense its faster on the flats, but worse in the waves. If you look at the V10 G3 compared to the SF, you will see the rocker profile is much more similar, and consequently people report the G3 is great on waves. Also makes sense.
So...
Dead flat water - V10 G2
Small+ waves (as in 8"+) - SF-S All Day
Mixed conditions - SF-S since its so much more fun in the waves
One caveat may be, I am 185lbs, 33.5" waist, 32" inseam. I have zero fat on my butt and hips. I barely fit the SF bucket. Im snug, and if I had any fat in the cheeks, it would not be good. Even initially it was borderline uncomfortable, but after paddling it several months now my butt seems to have conformed to the SF bucket. I only mention it because depending on how you carry your weight, the bucket could possibly rule out the SF. At minumum, I'd recommend sitting in it for a few mins.