Thank you for the information concerning the parallelism of the beams. I was unaware of that and the 4 times effect as well. So I _think_ my question was answered. The result is a shared effect of the beams rather the each beam effecting the other? Therefore symmetrical regardless of asymmetric...
Appearently, two beams of light in a vacuum are attracted to each other. Photons have no Newtonian mass, but their relativistic mass (e=mc^2 or mass-energy equivalence) causes this (as is my understanding). So will a 10^4 Hz beam bend more towards a 10^20 Hz beam than the 10^20 Hz bends towards...