I know that symmetrical variations of some openings are good up to a certain point, after which White gets a significant advantage (like gaining a piece or even mating the opponent's king). One such example is the match below, following the Italian variation of the Four Knights Game (C50):
[Event "?"] [Site "?"] [Date "?"] [Eventdate "?"] [Round "?"] [Result "1-0"] [White "NN"] [Black "NN"] [ECO "C50"] [WhiteElo "?"] [BlackElo "?"] [Plycount "27"] [FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"] 1.e4 e5 2.Nf3 Nf6 3.Nc3 Nc6 4.Bc4 Bc5 5.O-O O-O 6.d3 d6 7.Bg5 Bg4 8.Nd5 Nd4 9.Qd2 Qd7 10.Bxf6 Bxf3 11.Ne7+ Kh8 12.Bxg7+ Kxg7 13.Qg5+ Kh8 14.Qf6# 1-0
After the move
9. ..Qd7, White gains a significant advantage in which Black will have to sacrifice some pieces (even the queen in one line) or he is getting checkmated.
My question is: do you know any other example of situations like this, where White gets a significant advantage after a few moves performed in a symmetrical fashion?