I had a chance to try out a Droid Incredibile for three days. I prefer the Droid X for several reasons:
On the X I can place any phone contact on any screen and use either a widget or an apps. With the Incredible you are limited to "favorites" only and limited to nine. I see no way to set up another "favorite" on another screen..
You are limited to what widgets you can set up on your Incredible. It must be a completely blank screen or else such widgets as FM radio will not go on.
Sadly, the Incredible does not have Swype, which I use all the time on my X.
You can not set up vibration only for notifications. You can only wake up your Incredible by tapping the power button, with the Droid, you can also tap the home button to wake it up.
Finally, On the X, if you are on the very left screen and wish to go to the very right screen, you swipe and tap on the three buttons and your there. On the Incredible, you must swipe the whole way.
None of these are very big deals, I grant you. But they are minor irritants
Oh, don't get me wrong, there are things I wish the X could do like the Incredible. For example, the lock bar is so much easier on the Incredible to open up. The manner in which you delete a widget/apps from the screen is so much more easier on the Incredible than on the X.
As far as bars, and this IS a big deal. With the X I get 3g and four bars at home. with the Incredible, I get 3g and only two bars. Gladly, it doesn't interfere with calling or talking.