hmm given that at this level DA and DA is almost 100%, its a simple ratio of numbers.
Warrior is wielding 2x 60/20 weapons (base ratio 3.0) with damage augments:
+7, +9 in one (76/20 total)
and +7 in the other (67/20 total)
So we have dps rations of 3.8 + 3.35 = 7.15
while zeker has a single weapon 165/35 (base ratio 4.71) with a single augment:
+14 (179 total/35)
SO we have dps ration of 5.11
In my book, zerker has been owned
Zerker base weapon needs to come up about 210/35 to match just the BASE warrior weapons ratios. Though I would do something like 150/25 not to hit the dmg cap on the weapon stat variable.
And then Dmg augments available to zerker must have twice the amount of damage on them to counter for the warriors DW - which gets him double the number of augments.
Of course we also need to take into account an issue of triple attack AA, what its chance and if it affects the off hand. Cause if its not affecting the off hand, then when both have triple attack, warrior won't have twice amount of swing over zerker (6 vs 3), but only +2 (5 vs 3), which means zerker weapon needs to be 1/6th less effective than example I gave above, around 125/25 (ratio 5.0), which is better than what he has now.
And in either case- as I said, berserker DMg augments need to be TWICE as good than what warrior can get. (for example +18 dmg augment to counter warriors +9)
All above is based on what I know about raw damage - any experts feel free to correct me.