How does StorJ/MetaDisk/DriveShare compare to Filecoin?
 Will these be competing technologies that offer the same thing?

One of our writers wrote an article on Filecoin; I added a mentino of StorJ to the end

We can do a longer article on StorJ/MetaDisk/DriveShare for future. Perhaps someone can consult us. http://BanksWorstFear.com/contact

ARTICLE:
http://banksworstfear.com/filecoin-propose-application-blockchain/
Filecoin and File Storage Applications for the Blockchain