Nasim invested $18,000 in an account paying an interest rate of 7\tfrac{1}{2}7 2 1 % compounded continuously. Tamika invested $18,000 in an account paying an interest rate of 6\tfrac{7}{8}6 8 7 % compounded daily. After 9 years, how much more money would Nasim have in his account than Tamika, to the nearest dollar?