This is a territory issue for your pets - your cat is asserting himself as Top Cat because any pack hierarchy dictates that the leaders eat first, and the rest have what they choose to leave.
As long as both are getting enough to eat, and it's not causing spats between them, i wouldn't worry. As advised, if your cat is getting a good diet, a bit of pack mastery is all fine - they have obviously reached an accomodation, as domestic animals usually do.
If it gets to the stage where one or other is getting upset, you should maybe think about feeding them separately.