I created the high res model of the Widowmaker for Resistance 3, based on the incredible concept art of Carlo Arellano. The hollows you see on the creature's right side are what's left when the destructible goo bags that filled them at the start of the fight get blown up. The knee caps are also shown in their open and closed states--they were timed targets for the player to cripple the boss with. I don't know who made the in game model--I left Insomniac before the in game asset was finished.
Widowmaker (Resistance 3) turntable
Widowmaker (Resistance 3) turntable gray