Simple really?
Who is the better footballer?
Speed: Johann
Footwork: Tie
Passing: Rohan
Shooting: Johann
Dribbling: Johann
Vision: Rohan
Crossing: Tie
Ability to improve those around him: Tough one, but Id say Johann
Personally, I think they should both start as they are probably are most 2 in form players right now ... but if you had to choose, whom would you start?