Exlcuding the strange ghosty fire one, that last pic of the chess pieces that Seeker quoted from looks far more realistic to me than the bobbles in the bagginsbill thread do. Maybe it's the graininess that adds a bit of something to it. Those bobble pieces in that thread look like they were rendered over and image and are out of place. The lighting is better but lighting isn't the only thing that makes an image believable. The bobbles are too perfect giving the whole thing an artificial feel. 

The head in the linked pics is not the same head as the one in Teyon's renders. The ears, mouth, nose, skin, everything is different. Unless Teyon's version was sculpted more, the only thing the two heads have in common is they are both bald. The linked head image is again too perfect. Perfectly shaped ears and symmetrical face, the nose reminds me of M4/V4's nose. Compared to the asymmetry of Teyon's example. And I don't remember seeing any renders from firefly with that much depth in skin detail. I'd like to see some examples of a similar render from firefly if anyone has them.