I am not very familiar with the business of sculpting and moulding, but the interesting part for me between this two companies seems to be that they choose completly different approches of production.
As far as I understood Wargames factory is desiging and shaping the miniatures with the computer, where Warlord Games seems to take the "classical" way of sculpting in greens.(correct me if I am wrong)
I think this is the main reason why (at least at the pictures) the miniatures from Warlord Games look more "sharp" and detailed.
Will be interesting to compare the final results.