You can tell it like some fake if its somethings fishy. Also if you understand well the project but the tokens has a different use of it or just a copy.
Then how would you know if there is something fishy? Be more specific please. You can't tell whether a token is a fake or a scam by just looking at it or reading some descriptions because even the other old users had been fooled by these scams. Just stick to what is legitimate and have advice from your trusted co-users.