My Pelikan 4001 Blau Schwarz bottle ran out so I bought a bottle of Parker Quink Blue Black. I don't think I like it as much, it feathers and bleeds much more and the colour is not as dark. It's not a bad ink but I've got 57ml of it to go haha. The Pelikan ink is just terrific in my opinion. It is very well behaved and shades beautifully from light blue in the lines to a deep dark blue in the shades. It even smells like some kind of inky soy sauce. As you can tell I'm slightly in love with it so I'll miss it.
