Stones is a completely different sort of CB compared to Zouma. Stones can also play RB very competently. In fact, we could easily play something like: Azpi - JT - Zouma - Stones. Or partner up Zouma and Stones in some games because they're both mature enough. They complement each other very well. For me, John Stones isn't a signing for just now. It's an astute signing for the future. The Zouma - Stones partnership could be amazing in the future.