ok, starcraft is responsible for bringing me into warhammer. i played WFB a little, but wasnt really into it. my brother showed me tyranids and marines, and i thought "dude its zerg and terrans!"
except nids were here first
but yea you cant really compare them for reasons stated above.
(starcraft pwns)
and when starcraft TWO comes out....forget DoW!! i <3 blizzard