I saw the movie before reading this manga and was under the impression that Lelouch was somewhat of an incomplete immortal, meaning that he won't age but can still die if he's injured severely enough since the fact that he still can use his geass must mean he's not exactly like CC. But in this chapter, Lelouch has been shown to survive a fall that would have easily killed a normal person so I'm guessing he must be a special case.

CC certainly has changed a lot from how she was at the beginning of the series. She goes from being lazy, aloof, and selfish, not even willing to cook for herself. Now she takes care of Lelouch as tenderly as if he were a baby, even cooks for him everyday like it was Christmas.