Spy icon near leader name?

[SexyDude76]

I'm talking about that icon in the main screen near leader names, competing with the trade network and open border icons.
Sometimes the icon is there, sometimes it's not. What does it means?

 

[Bushface]

It shows when you have more espionage points against a leader than he/she has against you.

 

[Larklight]

Ahhh! Wasn't sure if it was that or the opposite