Leave it to obsessed AFOLs to figure out the code for the different Collectible Minifigure Series 3 figures. Apparently there are these raised dots at the bottom of the packages that are different for each figure. The “secret” code was figured out by that guy on fbtb.net
And too make it a little easier to tell where the bumps are Rick Therouxa has made a cheat sheet:
Collectible Figs Series 3 Dot-code
PLEASE NOTE: The gorilla apparently does not have dots, but instead is a “weird melted look.” Not sure what that means, but I guess you can distinguish it that way.
Based on THIS.
The bags have unique patters of raised dots along the bottom. I tried to reproduce the pattern the best I could tell from the pictures.
The Indian Chief and Samurai have very similar dot patters. I expect those to be the hardest to identify in-store.
I still say that it will be easier to just feel the bags, but hey do what works for you. ;)