Perhaps it's the influence of Windows (Phone) 8 with its brightly-coloured tiles, but both HTC and Nokia have chosen to make their high-end Windows Phone 8 phones brightly coloured as well. You can get the HTC 8X in black and dark blue, but Nokia's Lumia 920 is available in white, red and yellow. Our test models were a blue 8X and a red Lumia 920.
From the front the two phones look fairly similar. The coloured unibody warps all the way to the front of both phones. The displays almost appear to lay on top of the unibody casing, have rounded edges and almost seamlessly flow into the rest of the body. Below the screen are the requisite capacitive back, home and search buttons.
From the side you can see that the Lumia 920 is slightly shorter and a bit thicker than the HTC 8X. The shape of the 920 is more rounded than that of the HTC 8X. The finish on the back of the phones is different, HTC used a matte surface while Nokia used a high-gloss finish. The disadvantage of a glossy surface is that you can see all imperfections very clearly. As you can see in the reflection in the photo below, the surface of the back of the 920 isn't entirely smooth for some reason. It's not an eye-sore exactly, but it does take away somewhat from the high-end looks of Nokia's smartphone.