They are both QBs who have flunky releases, and great pocket presence. They are both nimble in the pocket, quick on their feet. Darnold is far more mobile and athletic as you indicated. Rivers is far more fiery though. Darnold might actually be more Big Ben then Rivers, maybe a bastard child of the 2; Big Ben is taller in stature. He's got some Winston in his game too. Darnold a very intriguing prospect.
