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It had more functionality and was structured more professionally. I would recommend comparing the documentation and you will clearly see what I mean.

OK it hasn't been updated in a while, how has it fallen behind Hive.js or is out of date?
Has there been much change to the Hive API?

Almost all the Hive libraries are not really maintained much, except when there is a hard fork and there is an emergency update, someone will usually dig in and figure out what needs to be fixed.

Thanks for the clarification.