Story Summary: Forced to spend his summer holidays with his muggle relations, Harry Potter gets a real shock when he gets a surprise visitor: Dobby the house-elf, who warns Harry Potter against returning to Hogwarts, for terrible things are going to happen. Harry decides to ignore Dobby's warning and continues with his pre-arranged schedule. But at Hogwarts, strange and terrible things are indeed happening: Harry is suddenly hearing mysterious voices from inside the walls, muggle-born students are being attacked, and a message scrawled on the wall in blood puts everyone on his/her guard - "The Chamber Of Secrets Has Been Opened. Enemies Of The Heir, Beware" .
Chamber of Secrets follow the great storytelling but this time it's a lot darker an creepier. I believe you feel the darkness and the mystery much more with Rowling's word than in the movie. You also get to see much more of the Weasly family and Diagon Alea. Many parts of it were cut in the movie and while in the movie, most of the parts are about the mystery, in the book you get (as always) to see more of the whole world. Also i preference much more the phoenix in the books XD
Again the special effects are amazing. Magic comes to life and it feels more real. I also found the way they portrayed Lockhart and Ron better than in the book. You get more of those two characters. The whole scene at the end with the basilisk was fantastic! And of course once more, they gave us a lovely soundtrack. Great addition was the scene with Harry, Hermione and Ron hugging at the end of the movie. It make me go "awwww.."
Final Winner: Tie. I believe both, are at the same lavel for small little differences.