You do realize this is like going into a bar and asking “does anybody here drink?”
There’s a wealth of information here about the S40 that will probably answer any question you might have about it. Spend some time and look around.
FWIW, I own both an S40 and a V20c. I enjoy riding them both. There’s a certain amount of ”horses for courses” i.e., I take the V20c when the route I’m planning on isn’t egregiously hilly, I’m riding solo and I want to go fast (NB: I do ride it other times as well). The S40 is for hillier routes, riding with others, rougher roads (bigger tires), gravel, etc. I would generally characterize the two as: the S40 is more versatile but still plenty fast, the V20c is a race machine.
Good luck and happy reading!