I personally think X1 > U Pro > DualScreen 4.
But only by a little little tiny amount for each.
Battery Life : U Pro Wins Hand down. (60+hrs!)
Back Buttons : PS over X1
Joystick things: U Pro since they are symmetrical AND on the top, plus all of them are practically the same thing anyway.
D-Pad: As much as I like classic Nintendo version of thier invention, The X1 feel better when pressed. DS4 has buttons instead.
Buttons: DS4's shapes confuse me. UPro has best shape and feel but X1's are larger and better coloured lables, so tie.
Shape: X1 is the best. Very very comfortable!
Other Features: DS4 has a couple useful ones like Share and a big light thing.
So basically, Gamepad last for being pointless when everything cancels out and X1 first because it's slightly better than the rest while U Pro is better half of middle.
Ultimately, the controller is one of the last things I look at when deciding a console. 
