are these Ram the Same

1. Vengeance 16GB DDR3 1600MHz CL Dual Channel Kit_ CMZ16GX3M2A1600C9G



2. . Vengeance 16GB DDR3 1600MHz CL Dual Channel Kit_ CMZ16GX3M2A1600C9



There is a "G" at the end of the kit I already Bought, They are out of stock and # 2 is available on line



Can I mix these or should I wait till I can get exactly the same.



Thanks in advance for your assistance............drummond