David Campbell-Ninja Warrior All Star.
Ryan Stratis-American Ninja Warrior.
David has been in Japan many of times & he was close to the final Stage. Ryan is a US Army Athlete who is in all three seasons of American Ninja Warriors.
A Ninja vs US Ninja thats not random.
- Weight/Strangth-David is havy than Ryan but Ryan is Strange. (160/145).cm
- Brains-Thir Brains are about the same. (52/52)%
- Speed-David & Ryan are probley the same. (170/170) M.P.H.
4. Wins-David's was in Seasons 1-3 thats 3x10=30 & Ryan's Results in 3rd season 1:03.15+3:22.21+1st Semi Finals+13.97+18.41+4
I think the Daedliest Challenger is Both!Edit
Becuse their both are Warrior of a live time. But you can vote your Challenger on comments.