If I have to make that kind of choice. I would choose blackberry. It is quite fast and stylish. I don't really like to type on screen cause you couldn't feel the real keypad. This basically come from my previous experience when I used o2 atom.
I think the Apple iPhone 3GS is a worthy successor to its predecessors and the BlackBerry Bold is one of the best BlackBerry phones ever made. The iPhone 3GS is a consumer phone with something for everyone while the BlackBerry Bold maintains BlackBerry’s reputation as a business gadget. At the end of the day, it’s what the user needs that matters the most.