Thought I noticed during Beta, but didn’t fully get it until just now.
Val- 2x damage, much longer duration (~30 seconds?), can sustain infinite hits for the duration
Laz- 1.5x damage, short duration (~20 seconds?), each Weakpoint can only take a few hits before disappearing.
Val’s WPs require sustained fire and decent aim, but if you can manage these, the Monster’s armor melts away. Works exceptionally well with low spread machine gun-type weapons like Laser Cutter and SMG. Laz’s damage buff comes in short bursts, but allows all Hunters to wrack up a handful of bonus damage due to his rifle being semi-automatic (can plaster the Monster with ~20 WPs in a matter of seconds). Works best with single shot, high damage attacks like Shotgun.