Jamal,
I think that what you're referring to is the type of pitch bend "joysticks" that Korg and Roland uses on their boards. To answer your question, NO, their is no difference in the sounds that you can produce with either type of pitch bend (joystick or wheel pitch bend).
The only difference in what you can produce is that with the "joystick" style pitch bend controllers, the modulation is also on the same controller. The pitch bend is usually "up and down" the joystick while the modulation is "left to right". So for live solo keyboard stuff the joystick allows the player to do some solo expression with bends and modulation a bit easier, because the modulation and pitch bends are on one stick. But in the sequencing world where you might want to put the modulation "on" and leave it "on", the separate pitch wheel and modulation wheel does this a bit better. So with your DJX, the pitch bending is the same. For sequencing work, you actually have a bit more control with the separate pitch/modulation wheel controls.
Rev E