Which fingerprinting hash should I use to determine whether two accounts belong to the same person?

Updated on 12.04.22
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In this case, the cookie hash is guaranteed to be 100% accurate. For desktop users, the browser hash is a good alternative option. They are less likely to have a matching browser hash than phone users. 
Mobile devices, on the other hand, can have the same browser hash if more people have the same iPhone version.

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