How much more in grant date value does Nicholas R. Noviello have compared to Amy L. Cappellanti-Wolf?
{"Gregory S. Clark(1)": {"FY19 RSU Award Amount (#)(2)": 0, "Grant Date Value ($)": 0}, "Nicholas R. Noviello": {"FY19 RSU Award Amount (#)(2)": 95416, "Grant Date Value ($)": 2106785}, "Amy L. Cappellanti-Wolf": {"FY19 RSU Award Amount (#)(2)": 78620, "Grant Date Value ($)": 1683254}, "Samir Kapuria": {"FY19 RSU Award Amount (#)(2)": 238243, "Grant Date Value ($)": 5100783}, "Scott C. Taylor": {"FY19 RSU Award Amount (#)(2)": 61339, "Grant Date Value ($)": 1354365}}
noviello_grant = df["Nicholas R. Noviello"]["Grant Date Value ($)"]
cappellantiwolf_grant = df["Amy L. Cappellanti-Wolf"]["Grant Date Value ($)"]
answer = noviello_grant - cappellantiwolf_grant