This is Honto, here.
Okay, here's a hint that's Sasuke's emo. In this fanflash I found from 1:21-2:02 Sasuke's song is Crawling by Linkin Park. Crawling is an emoish song. Through the segment, the song signifies that Sasuke is still morning his past and won't let it go and that the thing Itachi did is "crawling beneath his skin" and his "wounds won't heal" until he gets his revenge. >.>
When Gaara smacks him and tell him to shut up, it's basically saying that Gaara had a worse past but he isn't dwelling on it like Sasuke. Gaara had no love from parents and everyone wanted to kill him while Sasuke had a loving family that was killed by his older brother. Like I said up there, Sasuke dwells and obsesses while Gaara goes on with his life, forgeting his past.
Hope you enjoyed the entire flash made by Snow Dragon from New Grounds.
