Yep, that's it. Red ones have the black/white decals, where the yellow/white ones had the blue/black decals. Someone REALLY has to know the serial numbers to identify if it was red or yellow/white. I know a lot of folks that take the yellow/white ones and repaint them red just because they like them.
However, that's not a real indication of IH-built -vs- CCC built tractors in the *82 series. All of the IH built *82 series tractors had cast iron rear ends, which were painted red, and the whole tractor was painted red. There were no IH-built *82 series tractors that were painted yellow/white.
After IH sold out to Cub Cadet Corporation (MTD), there were a few years where they had the same model tractors available in red or yellow white. ALL of these tractors have aluminum rear ends that were painted black from the factory. If you're looking at yellow/white *82 series tractors, they are ALL built by CCC, and none were built by IH.