The Droid X is a completely different model than the first gen Droid. They both reside in the Droid "series". The Original Droid has a slide out keyboard & 3.7" display. The Driod X has a touchscreen keyboard & 4.3" display. The Droid 2 is a second gen version of the original @ retains the very popular keyboard.
My opinion is, if Apple would have included a slim slide out keyboard on the iPhone they would have lured thousands of BlackBerry users, and surprised the mainstream with ease of use via fast input for lengthy emails & texts. Or... Apple could have done what every other smartphone maker does and offer more than one model. One with, and one without the slide out keyboard.
At times Apple's decisions baffle me. Why they would lock themselves into just one carrier for so long, for example. Or only offer one model of iPhone. I can hear the fanboy responses already... Like "to perfect one phone" and on and on. That's a stupid excuse, since Apple has all kinds of products it focuses on. Anyway, it's just my observation.