I was comparing both The Cost and All Hail and I think this scene was the most interesting to me.
Chief’s scenery is very dark and in this scene, his statue is quite banged up, especially towards the left back side of his head. Maybe its linked to losing Cortana, maybe its how he sees himself or how he feels now. Broken.
While Locke’s scenery is bright and the statue seems somewhat intact. Keeping the image of the Master Chief intact as a hero to humanity is important to his mission according to the trailer. A squeaky clean image of a savior.