ScottS,

Though I am by all means a amateur in this regard if I may lend a opinion based on my limited knowledge.

I have no idea as to the actual breaking point of either design, I am of the opinion that both are of adequate strength and neither executed in a proper build will cause a problem. The under lever is known for its strength and IMO would be the best or the stronger of the two but the question could be not which is stronger but is either weak and I would say no on this point.

Its quite like is this better then that when both are overkill in the fist place.

Just my opinion,

James F. Nixon III