I thought they were the same worm.
I have a huge problem with them in my corn. Left alone, there could be 6-10 worms in every ear, and the mold they bring with destroys the entire ear. Control involves squirting a bit of mineral oil in the end of each ear as soon as the silks show. I’m not sure that would work for sweet corn, but for dry corn it works pretty well. The oil is gone by the time they’re ready to harvest. I only lost a few ears to worms last year, and I think they were the ears that hid when I was patrolling.
Same insect with different names depending on the crop.
The razzle dazzle on “different” species is a bit much. Perhaps, different races of the same species would be a bit closer to reality.