Good analysis from Ben Thompson on where Box and Dropbox are coming from:

In other words, what we have here is one of the more interesting business experiments we’ve ever seen: is it better to have established a firm foundation in the top-down enterprise market that actually matters – i.e. Box – or to have built tremendous goodwill and customer loyalty with actual users – i.e. Dropbox?

There is another aspect to it that he doesn’t talk about. Both companies are from the US. Both will have to deal with a blow to their business because of the NSA. I don’t see a major company outside of the US choosing Box or Dropbox now and some existing business clients will most certainly leave Box. It’s a shame but it is not the fault of the companies nor of the boxes.

We will see how this will turn out. I used to think that Box is better positioned but post Snowden Dropbox might be slightly better off having already started to establish a platform¹ agnostic way for app developers to store personal data from their customers.