Blood Legion

i get "Gurthalak, Voice of the Deeps" at LFR and i have normal Experimental Specimen Slicer.
I did a test of 5 minut on Dummy 85+ with both and had the following results:

LFR Gurthalak :: 23.060dps (9% tentacle)
Normal Experimental :: 23.489dps

with this results is recomended use Gurthalak to try my luck with procs? regardless of your stats are below of the Experimental Specimen.

Ps: Forgive my english...
Armory
Last WoL

It really depends on your race. If you're an orc, I'd probably suggest the Experimental Specimen Slicer. There has been a ton of theory-crafting around this weapon and I've been told by fearnot that the LFR version is even better than the Heroic Experimental Specimen Slicer, but I don't believe it. I don't think he factored in the 3 Expertise he'd lose from using the axe, let alone the 3 he'd gain from being an orc (like me).

Gurthalak. The proc is too good to pass up. No ICD and fairly 'high' chance to proc.