That's pretty much a toss-up choice, IMO.
I still may lean a bit towards the C4 Cab- I just love the wide body (and higher hips). You'll still have outstanding performance with the C4 Cab too. Need to see it in person, but the pictures show an obvious diff., IMO.
Now if it's between the C4S Cab and C2S Cab, I'd go for the 4S Cab with little doubt.