Originally Posted by jacobsaa
I think the most important feature is the keyboard. While both are QWERTY, the Curve has a 1:1 button to letter ratio, while the Pearl has the standard number keys with letters built into them. I personally like having a bigger keyboard.
That, as well as a few minor application differences is what makes the Pearl and Curve stand apart. I would classify the move as more of a lateral move, not an upgrade. It just depends on what you like.
Not entirely true. The Curve has a full one letter per key QWERTY keyboard. The Pearl uses "suretype" which has two letter per keys in a QWERTY configuration. It guesses what you are trying to type based on context. You either love it or hate it, but its not the same in size or operation.