The two conferences will cover different topics and will be held in California and Vienna.
The first, sponsored by the Bitcoin Foundation, will be held in San Jose California on May 17-19 and is titled “The Future of Payments”. Discussion will be on Bitcoin technology, Bitcoin mining, Bitcoin business and regulatory issues.
The second, in Vienna November 1-3, is titled “unSYSTEM”. This conference, as Bitcoin Magazine put it, “is pushing even further in the direction of activism.” Many of the speakers are known activist rather than Bitcoin developers or entrepreneurs.