The three main complaints about the upcoming Galaxy S3 device have been about its Pentile display, which many didn't expect to see in Samsung's flagship phone, the design, which naysayers claim that looks like any other mid-end or older device, and, one of the oldest criticism about Samsung's devices (which apparently they're still refusing to acknowledge), the fact that it's made of “cheap-feeling” plastic.
TechnologyAndroid.com, an Italian Android site, has tried to compare the displays of Galaxy S3, the Galaxy S2 and the HTC One S, to see how they fare against each other, keeping in mind that all of them are Super AMOLED displays of some kind. The Galaxy S2 is the only “Plus” version, although with significantly lower pixels (at 800×480 resolution), the One S has a 960×540 resolution, Pentile, and finally, the Galaxy S3 with a 1280×720 resolution, also Pentile.
Here are the images of the side by side comparison:
As you can see, it's pretty hard to notice much difference with the naked eye, and it's also hard to see how accurate the color reproduction is, since the Italians didn't compare the three AMOLEDs to any LCD display (which has very accurate colors). What we can see is that the colors of the Galaxy S2 are a little lighter compared to the One S and the Galaxy S3.
In the above image, we can see that the One S has a lot whiter “whites”, and therefore it's a lot more accurate when it's representing the white color. This has been a problem with Super AMOLED displays since day one, but you don't really notice it unless you put the device next to another phone. But the One S uses Super AMOLED, too, so how did they manage to get it that white? My guess is HTC calibrate their own displays, and they managed to make the white a lot more accurate.
Besides the bluish whites, you'll see that Super AMOLED also has a hard time distinguishing between the darkest shades of black. This means that, when you're playing a space-themed game or watching anything like that, where the different shades of black matter, Super AMOLED might not be the best choice. You can see what I'm talking about in this video, which compares LG's AH-IPS display and the Super AMOLED Plus display in Galaxy S2: