I believe they are two different things.
"Corn gluten meal is a by-product from the manufacture of corn starch and corn syrup"
Cracked corn is just dried, cracked corn. And the less expensive of the two, I think. (not sure)
Mind you I know very little about this and that's just what I've read.
A1-Grass - High Quality Lawn Service
There is unrest in the Forest, there is trouble with the Trees
for the Maples want more sunlight and the Oaks ignore their pleas..