There have been reports which indicate that GCHQ have greater capabilities than the NSA, but they are based on leaked documents, produced by GCHQ, to make thems

There have been reports which indicate that GCHQ have greater capabilities than the NSA, but they are based on leaked documents, produced by GCHQ, to make themselves look good to other surveillance agencies. The NSA has a budget which is equivalent to that of the entire British military.