I had read an interesting way to make sure the project is real. You can identify the project is fake by it's address of the company who is running IEO/ICO. Fake project would be indentify with this way because they put fake location. You can check it with google maps to verify if it's real.
So how do you indentify if the project is fake?
I think that's not a good way, because they can rent an office there and when the project is complete they can easily go elsewhere. To analyze and identify scam projects is quite easy, you only need to note 3 things.
1. The web design is very sketchy and the whitepaper is often copied from other projects.
2. Roadmap is also not detailed and clear, the direction is misleading and always aims to make the price pump strong.
3. Huge discount with the purchase at seed round, about 50% - 60%, it can be considered as a scam project.
From the analysis of the projects, I have drawn out 3 things, hope it helps you.