Comparing Box.com with Dropbox is like comparing apples to oranges in my opinion. I have a 100GB dropbox account for personal use and a enterprise Box.com account for work. They are two different service aimed at different markets. Box.com has always primarily been driven by its web interface where I can count the number of times I have used the dropbox interface on one hand.
In a business environment you cant ask your clients to install software on their computers in order to share files with you. First off it may not be allowed by corporate policies or security controls and even if it is allowed would you install software a vendor asked you to install to accommodate their workflow? Box.net is absolutely awesome in a business environment and has allowed me to get rid of insecure FTP servers and clients trying to use their web browsers as FTP clients and blaming us when they did not work. Box.com also allows project managers to create and manage permissions on their own client folders freeing up IT from that task.
In a business environment you cant ask your clients to install software on their computers in order to share files with you. First off it may not be allowed by corporate policies or security controls and even if it is allowed would you install software a vendor asked you to install to accommodate their workflow? Box.net is absolutely awesome in a business environment and has allowed me to get rid of insecure FTP servers and clients trying to use their web browsers as FTP clients and blaming us when they did not work. Box.com also allows project managers to create and manage permissions on their own client folders freeing up IT from that task.
In short I would not give up either account.