Based on the wording of the two procs (rage of vallon & rage of zek) you would think they would have close to equal hate generation -500.
However, I've noticed substantially more agro from 2 handed version of the weapon *when it procs*...perhaps the .dat files are out of date? Seems like the 2 hander proc != the 1 hander agro generation. /shrug just an observation & purely subjective in nature.