hg was not superior to git at v1. I have no idea if it is now. hg was horrible at git style branches wich are arguably a killer feature of git. I've heard they were grafted in to hg but you can go look up old tutorials on the net from say 2008 and see they were clearly not the norm for hg
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looked it up, the feature is called "bookmarks" and was added in 2010. And even after added, all tbe tutorials ignored them. no idea if they are the recommended workflow now but if not then you probably don't get why git is superior to hg