On other longboard forums and on this site I have seen confusion with some wheels so I am here to clarify things.
There are several wheels that come in the same size, duro, and formula but are different colors. All 3 of the wheels listed below are the exact same, they are all classic thane and made by abec 11. Meaning, they all slide the same and leave thane lines and have the same wear pattern.
70mm78a classic zigs - http://www.socialskateboarding.com/p/abec11-classic-zigzags-70mm-78a-green
70mm78a pink seven o's - http://www.socialskateboarding.com/p/pink-sevenos-70mm-78a
70mm78a retro zigs - http://www.socialskateboarding.com/p/retro-zigzags-70mm-78a-red
The next set of wheels is the one that has been causing confusion. It is the 70mm77a Reflex thane zigs. These are a more race oriented wheel and are often confused with pink seven o's. These wheels have the chattery slide at slower speeds making them ideal for racing but not for everyday freeriding. Social does not currentl have these in stock but here is a link to a photo.