If you are qouting kage summit, Gaara would have got destroyed by Sasuke if there hadn't been any Raikage snaring at sasuke as a predator........just stopping amaterasu doesn't prove gaara to be stronger than sasuke + I don't consider amaterasu to be a brilliant tech. which should be feared so much by S-class ninjas...I think Gaara because i'm sure Gaara can block most of Sasuke's attacks.
sorry for multi-posting, but Gaara couldn't dodge sasuke's very first and weak Chidori as Kakashi indicated that he's taking too long executing chidori.I think Gaara because i'm sure Gaara can block most of Sasuke's attacks.