Black Paint, Nighthawk vs. Crystal?

I'm looking at ordering a rear spoiler for my CRV, which is beige (see recent post in Wheels section), and I want a BLACK spoiler (and BLACK side steps).
On the spoiler, paint code, I see H and A has 2 choices, "Nighthawk Black Pearl" and "Crystal Black Pearl".
What's the difference, and which would be better?
:confused:

The Nighthawk Black Pearl (great name BTW) has small blue and purple flecks in it that sparkle in the sun. I have no idea what the crystal black looks like.

I have a 2009 Black Crystal EX. Near as I can tell, it's just plain black. Nice black, but black.

al