Cindy Moon, Silk, was bitten by the exact same spider that gave Peter Parker his powers, as established in Amazing Spider-Man vol. 3.
While they both possess almost identical powers, Cindy's Spider-Sense is demonstrably better than Peter's. She also possesses the ability to produce organic webbing though, unlike Peter, who requires mechanical web spinners.
Is there an explanation for this, or is it as-of-yet unexplained?