ive seen various tests that show the strenghth of repair on cadavers varied greatly, like about 2x. in any case, no tests are out there comparing failure loads on healthy healed arms. After healing, they are all the same, the real concern is minimizing cost, recovery time, and complications from surgery.
for those that cant convert, 250 newtons is about 55 lb force. given the leverage implied by the distance of hand-elbow relative to repair-elbow distance, it would only take maybe 5-7 lbs in the hand to pull out type repair, neglecting that other muscles beside bicep are carrying part of load. when you curl 50 lb, that bicep contracts with several hundred lb force.