Had to read Angels & Demons before seeing the movie. So managed to that this weekend. Naturally, even when you do not wish to, comparison with The Da Vinci Code is inevitable.
Here's my take on it.
As a book the Da Vinci Code is far superior to Angels & Demons. In The Da Vinci Code, Dan Brown actually invites the readers to solve the clues along with the main protagonist, Robert Langdon. On the other hand, unless you live in Rome and have spent your considerable time staring at the architecture and sculptures of the temples, you are unlikely to solve - or even attempt to solve - any of the clues in Angels & Demons. So, as a book, I prefer The Da Vinci code.
It is exactly for this reason that I predict that the movie Angels & Demons will be a bigger box office success than The Da Vinci Code. It is always difficult to project mental processes on to the screen, though I must say, the director Ron Howard of Da Vinci Code made a valiant attempt to depict Langdon's thought process by superimposition of shots and using sepia tint (Is that what it is called?).
Oh! By the way Mr. Dan Brown, Hatha Yoga is not a Buddhist practice. You might want to update Angels & Demons.