They are all differents. I recommend you to try some of them and choose the one you like most. Just put the files (patch.dat and patch.fat) inside your data_win64 folder. Also you can download from the page 1,#25 the second .mega link. Put the xml file inside C:\Users\"xx"\Documents\My Games\Watch_Dogs\"xx" Don't do anything with the other files in the .rar, they are "old".