Difference between green Cory catfish and emerald green Cory catfish

[Steven Williams]

I have a total of 3 Cory catfish I don't know which is the emerald and which is the normal green or is it copper? Please just tell me what they are because i thought they were all the same the largest is 3 inches smaller 2

 

[tlindsey]

One looks like emerald bronze, the best site to compare is checkout planet catfish site you will get better comparisons imo.