Take into account that not all AMOLED screens are equal. All AMOLED in the Nokia Lumia WP8.X family are Pentile Matrix (except for the Lumia 820 and derivatives) which means that Red and Blue subpixels are shared between contiguous pixels (in order to use less elements), and that means that it is more difficult for this devices to accurately represent the intended colors. This is why I personally prefer IPS LCD, colors are more natural and bright (if calibration is accurate). This and the extra 16GB is why I think L920 is superior than L925.
The Lumia 820 however has a gorgeous 4.3in non-pentile AMOLED screen (each pixel has Red,Green and Blue sub-pixel Elements), so this screen is capable of displaying super-saturated primary colors, and an accurate palette, whith "perfect" blacks. I think this is the screen I like the most of all the Nokia Lumias, and of course its only downside is the low 480x800 resolution. Other than the resolution, this screen is truly gorgeous.
Because I use to be a Display Engineer it's difficult for me to accept pentile-AMOLED screens as anything other than cost-compromised displays (superior technology ruined by cost constrains) and although technically they do have the resolution they claim, they lack an important number of sub-pixels that affect color accuracy and sharpness (compare small font text). However according to Anandtech Site, the Samsung S5 which has a pentile AMOLED screen (since this technology is mostly a Samsung thing!), is now very close in color accuracy to IPS screens, which means that I soon may need to rethink my bias against pentile AMOLED.