2nd one from Mr. Frogg's front right foot? (or 3rd from the left as I look at them?)
After some further inspection mr. Frogg agrees with you. The drip tip is slightly different, and so is the shine of the metal. Oh, and the air control ring of the original is smoother, and the airholes are placed a little bit higher. Also the air control ring actually closes the air supply, on the clones it doesn't.