All About Symbian posted a review and comparison between these two smartphones. Apart from the fact that the A920 is targeted to 3G networks, I still think the P800 is a winner.

Take a close look and you'll find the A920 has no Bluetooth. So how can you take advantage of the extreme speed 3G networks bring? Using a cable?

It's also a little bigger than the P800, and as reported before, it's now application locked, meaning users can only run what 3 certifies and allows to be installed.

For me the P800 is still the winner, even though it's a GPRS phone only.

Photo from All About Symbian website