Both games are classic arcade games that have been remade hundreds of times. I like pong better because there is multiplayer and it basically started the video game industry.
Well, this is a very interesting topic. I myself love all classic games, but i would have too say that Tetris is better then Pong in my opinion. Tetris i think creates more of an interactive setting that forces you to pay much more attention to the game. Pong gets quite boring and repetitive that might find people quite exhausted after playing for a while. Tetris on the other hand doesn't have that type of atmosphere. Tetris also has colors which stimulates the mind into finding "joy" in the game. So my vote in theis classic game battle goes for me to Tetris. Hope my input helps this epic years old question.