In the cellular phone industry, the debate has always been Blackberry or iPhone. The most recent addition has now been the Android powered phones that have come onto the scene. I have used all 3, and to me the hands-down favorite is the iPhone. The iPhone works on iOS platform which I find is more user friendly than the Android phones, and can do way more than the Blackberry.
Some will say that the Blackberry is the ultimate business users phone. This may be true in some circles, but for me I find that the iPhone is far superiour for my business. For example the larger screen is great for looking at web pages as the screen on the blackberry can drive you nuts. Even the email on the iPhone is so much better with full HTML pages that look like you are looking on a computer screen. The list goes on and on. To me, between the two the iPhone is so much closer to having a mobile computer without the size.
The biggest advantage Blackberry users will tell you is the fact that they can use Blackberry Messenger (BBM). Well even that is no longer a problem with iPhone users with third party applications like Kik and Ping.
But now the BBM advantage may soon be gone altogether.
According to BGR.com Research In Motion may be bringing its Blackberry Messenger service over to Android and iOS according to their sources. It won't be as robust an experience as that offered on Blackberry's but will offer cross-platform BBM capability. Timing and pricing were not available.
The iPhone is taking over, and soon Blackberry users will start coming over to the other side. :)