Nope, there's 2 different kinds. There's a more transparent one, and the other is opaque (the one your friend has). Best I can tell, early versions of the game shipped with the more opaque one, while the common one is the fully transparent version.
Wish I had a pic of them though to show you. Not really "special", just one of those little mini differences in the product. (Something that once again leads me to believe there's 2 separate facilities producing the figures which is why we see variations of paint on them; ie- Chill and the whole lip/hair thing and the SSA Stump Smash "moss" from late in the line)