If intel is manga then Kakuzu potentially takes this.
Considering Kakuzu is a bounty hunter, and even fought Hashi. It would be no surprise if Kakuzu was aware that Hiruzen had mastered leaf jutsu. He was revered as the [3rd] god of shinobi after all.
On the other hand, Kakuzu is a nobody to Hiruzen really. Hiruzen wouldn't know what he can do. Hiruzen was widely known, Kakuzu wasn't.
...If that was the case, Kakuzu would get his hearts out immediately (no dicking around). Hiruzen would be confused as to what was going on, and the hearts would overwhelm Hiruzen. Initially he would react by summoning Enma, but is Enma's cage really defending against all of the hearts?
On paper Hiruzen wins, and if intel was full then Hiruzen would of course take this. But I see intel going in Kakuzu's favor here.
Btw i'm giving Kakuzu an argument so it's not Zex vs Narutobase lol.