I imagine that an open world will work out better for rational people generally. So I favor Wikileaks.
Wikileaks has publicly revealed more sensitive military documents in the past year than the entire world's press combined... The claim may be true for other document types as well, yet it is hard to establish. Military and intelligence documents have classification labels that can be easily searched for, while other leaked documents are hard to distinguish from public content.
The statistic reveals perhaps not so much the ongoing strength of Wikileaks but rather the bankrupt condition of the rest of the fourth estate.