Which black dye to use?

I have several black dyes and I wasn’t sure what the difference was, so I decided to dye fabrics in gradations using three of them to see If I could see any difference. This was the result. I think it’s important to know, because you may choose one over the other depending upon what fabrics it lays next to. On the left is Jet Black, New Black is in the middle and Better Black is on the right. All are Dharma fiber reactive dyes.