There's definitely been a different approach between the Weta statues and the later SSC statues. It seems the Weta artist where involved on a different level with the whole project to begin with.
Anyway, as I said before, I'm still very happy with the Weta representations of the Moria Orc Swordsman, the Orc Archer, the Berserker and Lurtz. From that list, the SSC Lurtz is the only one that is completely different from the Weta statue. That's one of the reasons why I got it. The others, this Orc and the Berserker are - in regards of appearance - close to what Weta did at the time. So, why buy them? For the size? The SSC sculpting is outstanding though, but not reason enough for me to invest $600. It would be an other story if I wouldn't own the Weta statues already, I have to admit. I'd kept my orders for the SSC MO and Berserker I belive.