you'd want the most advanced Russian aircraft in a dogfight.
Speed has its place in air combat. But most of the consensus on modern air warfare has pretty much relegated dogfighting to the dustbin of military history. As was noted, when it comes to modern long-range weaponry and satellite/ground coordinated tac-intel and support, being fastest no longer matters. Having the best "eyes," being the stealthiest, and having the longest striking range will outweigh raw speed every time. The original stealth fighter (the F117 Nighthawk) was only capable, by design, of subsonic flight. And it didn't much matter. [Note: According to official reports, in the thousands of combat operations conducted between 1984 and the Nighthawk's retirement in early 1992, there has only been one incident where of an F117 was shot down, and a (disputed) second incident where an F117 was seriously damaged by enemy fire.]
But where almost all US weapons systems excel is in their coordination and operational intelligence.
Forays today are no longer the exclusive domain of ace pilots acting on their own or with a small squadron of fighters. Todays operations are an extensively coordinated activity involving satellite and air reconnaissance, ground observers, support units, backup teams, "second strike" and related operations. And all of it is coordinated by global command and control communications which greatly reduces incidents stemming from the old "fog of war" problem.
It ain't your grandfather's - or even your Dad's battlefield any more.
The next step will be pulling the soldier off the battlefield as much as is humanly possible. (Far easier for politicians to convince their country to take military action if the nation can go to war without putting it's own boys and girls in harm's way.) This is whats driving the interest in combat robotics. The attack drones are the the first in what will eventually become whole new families of combat systems. And last I heard, walking and swimming remotely guided weapons will soon be joining the fray in a war near you if the research continues at its present pace.