My take is that there are only two kinds of AMOLED screens coupled with various gimmicks

RGB AMOLED (E7, i8910, SGSII, 900, N85 et al.)
PenTile AMOLED (Nexus One, SGS, N9, RAZR et al.)

"Super" stands for the gimmick that it has the touch sensor integrated
"CBD" stands for a polarizer filter on top of it (Nokia only, samsung also have polarizers but don't advertise it)
"Plus" stands for non-PenTile (Samsung only - Nokia also has RGB Stripe screens but they don't advertize it)

98% of AMOLED Screens are made by Samsung according to wikipedia, so probably Nokia and Samsung screens are the same.

The deciding factor is probably the subpixel size. They start from what res and size they want and if it fits they go for RGB, else they go for PenTile. I expect Samsung to keep the higher res RGB screens for themselves for some months before licensing them to others, so that it helps them achieve World Domination™

So basically they are all AMOLED displays, nearly all Samsung sourced, with differences in:
-screen size
-resolution
-subpixel coordination (PenTile vs PenTile&white + RGB)
-"Super" sensor (viewing angles, polarizer, brightness, consumption)

To simplify things, they can be grouped into 4 categories:
1)Super AMOLED (RGB)
2)Super AMOLED (PenTile)
3)AMOLED (RGB)
4)AMOLED (PenTile)

1) Only available on SGSII
2) Available on RAZR, Droid4 and all Samsung phones (Wave, Galaxy S, Galaxy Nexus, Note)
3) Nokia Lumia 900
4) Nexus One, Desire, etc etc (many phones from 2010)

My understanding too basically....
Although (1) & (3) is also known as SAMOLED+ & AMOLED+ respectively.
The "+" refers to RGB (non-PenTile) sub-pixel config, but is more-so Samsung's exclusive marketing name IIRC.

I did a bunch of research yonks back, & found everything that defines the "Super" in SAMOLED (escapes me now, will dig up).
This enabled me to conclude that the N9's CBD AMOLED (despite not being appended w/"Super") is basically a SAMOLED (Pentile).*
That would make the 900 a SAMOLED (RGB), assuming the rumors are correct about it's sub-pixel configuration.

*These were two of the reasons reasons, but quite sure there was more to it:

Dubai, being one of them. Here every phone goes 'factory-unlocked' alongside network-locked units... that's a TRA regulation.

Which also reminds me... we could get unbranded devices [w/out the AT&T logo] there!

Yep, the Lumia 900 was originally named 'Ace'... how, why it got dropped - is unknown.

How Stuffs Work? AMOLED



1. AMOLED (active-matrix organic light-emitting diode) is a display technology that generate light upon electrical activation that have been deposited or integrated onto a thin film transistor (TFT) array, which functions as a series of switches to control the current flowing to each individual pixel. Two primary TFT backplane technologies, namely polycrystalline silicon (poly-Si) and amorphous silicon (a-Si), are used today in AMOLEDs. These technologies help fabricating flexible plastic AMOLED displays - the backbone of smartphones.

2. Super-AMOLED is a variant from AMOLED (marketed by Samsung, soon being industry standard on all smartphones) mainly for the layer that detects touch - is integrated into the screen rather than being overlaid on top. Super-AMOLED advantages are brighter screens, less sunlight reflection and reduced power consumption.

3. Super-AMOLED Plus, first introduced with the SGS-II and Samsung Droid Charge smartphones, is a further development where the PenTile RGBG pixel matrix (2 subpixels) is replaced with Samsung's "Real Stripe" (3 subpixels) RGB subpixel arrangement. This goes from 8 to 12 subpixels per group, resulting in finer details. The screen technology is also brighter, thinner with AMOLED Plus displays being 18% more energy efficient than the previous Super AMOLEDs.

4. HD Super-AMOLED is a new S-AMOLED display from Samsung. The 1st device to use it was the Galaxy Note. The 2nd device to use it is Samsung's Galaxy Nexus phone - with a 4.65" display with 1280x720 resolution. The higher resolution and dpi were made possible due to a change in materials and new manufacturing process, though still using shadow mask (or fine metal mask [FMM]) technology. However this required a change back to pentile RGBG subpixels.

5. HD Super-AMOLED Plus. Samsung is expected to introduce a new screen using "Real Stripe" RGB subpixels with the move to the laser-induced thermal imaging (LITI) process. The change to LITI is also said to be an important step toward commercializing OLED TVs.

NOTE:
-AMOLED fabricators include AU Optronics and Samsung.
-Samsung has marketed their version as Super-AMOLED.
-Clear Black Display (CBD) is an AMOLED display with a polarized filter on top.
-DuPont used computational fluid dynamics (CFD) to optimize a new solution for AMOLEDs.
-DuPont's technology is cost and performance competitive for large display sizes.
-Though specs r yet unclear, it is expected that the Lumia 900 uses a Super-AMOLED Plus screen.

Qorax

Why is this in the "Nokia N9 / N950" section?

Strange all the discussions about naming of screen tech: honestly I couldn't care less what Samsung is calling it's latest screen prototype technology.
I may be wrong on Lumia 900 being SAMOSUPERLED Plus Extra Razortina but the Pentile should not have made it to the N9.

Nokia engineers have made a critical (or deliberate) mistake to use this tech and it will age very quick. What is worse, it tires the eyes too.

Pentile should never have made it to this one of a kind device. Period.

No excuse of better black, resolution or ppi restrictions or requirements will set this straight.

Come one, we are watching poorly calibrated 16 bits graphics here. I want my text readable.

Steve Jobs wit his retina showed at least some insight in the matter.

Now that the Lumia 900 has better screen tech it is all the more clear that we got the Windows mid range testing intro hardware at a premium price. Forever.

qorax, are you Elop?
(seems like you're from Canada aswell)

Sorry Sir.
Just b'coz I'm "only" here - in this section.
The inconvenience is deeply regretted.