It makes sense that it does look different so they're fake but why can't the people making fake ones just copy the exact same label? There's no way to tell something's 100% legit because I can go to a printer and have that made exactly the same.
Even the pharmacies get fakes every once in a while, so it is really tough to tell even if you get it from a legit source. However, if I am blasting 18 iu a day, like some people are, I would probably know pretty quick if it was real or not.