Saturation is a matter of preference. For someone who's spent years working outside, I'll take "washed-out" colors to a completely illegible screen any day. Try it sometime, noon, summer, California, in a field surrounded by shiny crops and light-colored soil. No AMOLED screen is even remotely legible under those circumstances, which was one reason my employer issued BlackBerry devices.
That said, I went from a Samsung (Exhibit 2) with an AMOLED display to the N4. The only color that looked better on the Samsung was black, and only under low light (e.g. indoors with lights on at night or with blinds closed). The rest were pretty similar. Plus, the IPS display on the N4 is probably just as capable of oversaturating colors as the displays on laptops (all backlit LCDs) are--either Google or LG simply chose not to set it up that way.