I don't own any of these so I can't tell for sure but I can give a little bit of general information that helped me a bit!
There are many ways to tell, one way is to feel the weight of the pins and compare them to the same collection or set to tell the difference.
Another one is the Mickey heads, on the back of real ones they extend off the edge of pin back without any border; with scrappers, borders are usually seen at edges, even in the middle of the Mickey head. Some scrappers are perfectly copied except they have a dull color rather than glossy.
Usually the front has dips in the paint or is a flat solid pin without any raises in texture.
Most are off colored compared to what they should look like.
The back’s texture on a certain pin should be sandy or have raised type texture, but the scrapper version will not have these features.
Most (not all) Disney pins have two raised bumps or nubs next to the pin that attaches to the pin back. Scrappers are often missing these nubs or only have one. (Not all the time, depends on the pin).
Some pins have incomplete information (this is where sometimes I refer to pinpics to make sure the pin has the same info on the back (sometimes pinpics isnt that great for this) or I ask someone who has one, like you are doing now!) or the stamped logos/information is missing, messy, jumbled or typo'd.
Now those aren't "follow to the T else its fake" but they are good guidelines to remember when you encounter pins when no one else is around you can ask. But the best way is to ask someone who has one too!
It's also important to remember that most pins that are real often do have small paint errors or things like that so don't have to assume it's fake based on that right away.
Hope that little bit of info helps!