I think you misunderstood what I said. Yes, the 928 is the black one. And I was complementing the screen. The deeper blacks make the screen look better.
Notice the front side-by-side shot of the 920 next to the 928? That’s where the deeper blacks of an OLED screen come to play. On the 920, you can clearly see where the screen meets the bezel. On the 928, the screen completely blends with the bezel.