I bought Lincoln Park After Dark partly for the name (I grew up near Chicago) and partly because it seems like this one is a classic that any complete stash should have. I have no idea when or why I got Shades of Dark; I'm sure I had a good reason at the time. Naughty or Nice I got because I had all but two of this year's Orly holiday collection, and I do love a complete set. Naughty and Nice I bought because I wanted to compare it to Naughty or Nice, since both were released about the same time. If I had more fingers on my photo hand, I could have added more deep darks into this mix, but let's just focus on these four.
I used two coats of all of these. If one of these things is not like the others, it's the China Glaze, which is redder, more of a berry base color. Finger Paints is the darkest, such a deep purple it might as well be black as far as I can tell. The Orly and OPI are the closest to each other, both just a touch less dark of a purple than the Finger Paints. It's really hard to see the differences in normal room light, though, so here is an overexposed flash picture:
I'm thinking I can probably let go of the Finger Paints and the Orly (if the OPI didn't come from the Chicago collection, I'd keep the Orly and give up the OPI because I like the Orly bottles better) but not until I do a vampy nail wheel for documentation purposes.