Well,we could debate which is more forceful all day. I don't have any solid figures to present. What I do know is that only servos I have ever had fail, in 15 years of flying r/c models, have been in a helicopter.

Ask the many, many guys who lost helicopters due to JR 8411 servo failures. JR finally acknowledged the problem and issued a recall. I'm told that this a very popular servo with the big plank drivers. I don't recall hearing any of them complain about failures...

Steve