NES Pallete Accuracy?

[Gaia]

As far back as the pixeltendo days, we ripped the NES games by means of grabbing a screenshot and plastering the sprite on paint and editing it out.

...Though it concerns me, are some of the NES sprites on the site's palletes actually correct? For example the Battletoads game rips seems to be using a different pallete altogether than what Metal Storm is using.

Even then some of the rips have muddled palletes as some of the monitors display the colors differently, and of course emulator differences (VirtuaNES, fceux, and nestopia immediately come to mind) as well.

There's also an issue in which is the -true- NES pallete out there as well, considering who compiled it, who ripped it, and who's using it to it's maximum potential.

So guys.. any ideas on what's an accurate NES pallete (other than plugging in an NES onto a PC, of course)?