Different labels on TUBES


I recently bought a set of tubes from a well known tube dealer and when i recieved them i noticed they were labeled differently.One has a white lable (amperex)and the other a gold lable (amperex).They were said to be a matched set,they look the same inside but the lables are different.Is this anything to be concerned about?The tubes were $100.00 for the pair.
spaz