You have made a choice, a decision. What is the point of worrying about what advantages other choices that you could have made might have?
The X-Pro1 is still a super camera, and is capable of super photographs. The camera will be limited only by your capabilities, not by what advantages other models may offer.
Enjoy your X-Pro1. I recommend the Fuji 27mm pancake lens, or the Fuji 35mm lens. With either of those two lenses, if you don't get great shots, then it's down to you, not the camera
Have a look at the photos on my Facebook or Flickr pages. Many of them were taken with the X-Pro1. Flickr will even tell you which camera was used for each photo.
Asking what differences other cameras have after you have ordered the camera will only confuse you, and will be counterproductive to your creativity, because instead of making do with the choice you made, you'll always be thinking "what if?"
Go take some wonderful photos with your camera, when it arrives, and don't worry about other cameras for now.... the best camera in the world is the one you have in your hands when you need it
