Agree with Charles1dad there is no substitute for auditioning both speakers yourself. They are both great speakers and have a lot in common. It'll all come down to a matter of taste. If you have the opportunity, go to Goodwin's High End where they sell both models, and usually on the floor for demo that you can play with a variety of gear.
FWIW, I own the S5s and absolutely love them to death.
You are choosing from two very good speakers. Good luck with your choice!
FWIW, I own the S5s and absolutely love them to death.
You are choosing from two very good speakers. Good luck with your choice!