As Jeremy says, it is a marketing term that Samsung uses to differentiate its AMOLED technology from the other HW vendors. Every Samsung AMOLED screen has been called "Super AMOLED" since I think the original Galaxy S. Safe to say that ANY phone OEM that sourced its screen from Samsung is using a SuperAMOLED screen, they just don't/can't call it that.
Odd relationship.... Samsung will gladly sell you the screen tech, but might get all pissy if you called it a SuperAMOLED in your promotional materials. But.. there's a LOT of cross polinization going on with these phones, so I guess I shouldn't be surprised.