I've sent a FB message (with pics of those in-hand pics) to WETA and complained.
Here is their response:
Yes, lighting can affect how a piece would look, and which focal length you use with your camera/phone camera + distance with the subject would affect the look also. However, based on the in-hand pics from collectors.. The heat vision head production piece (painted by factory workers) paint job and sculpt still doesn't really match well with the production sample.
I think I'll probably just wait for more proper pics in hand from other collectors, with proper lighting and color/white balance, and all. Furthermore, I'm thinking whether should I let it ship to me so I can see it in person then judge from there whether to sell it off after that.