You are misquoting the link. They say: "Is it more nutritious? The answer isn't yet clear."

They do they "The researchers concluded that organically and conventionally produced foodstuffs are comparable in their nutrient content.". That doesn't mean "Conventional produce and organic produce are nutritionally equivalent." If you add arsen to an apple you don't change it's nutrient content. An apple with arsen still isn't nutritionally equivalent to an apple without.