Spike It or CSI worm dye

What's your preference on plastics dye Spike It or Component Systems Inc plastics dye?

I keep a bottle of spike it chartreuse in my boat all the time. I've had some of my plastics so long that the color has faded and it freshens them up nice and adds a little stink at the same time. Never tried the other. A red tail works good locally and I'm getting a bottle of red next time I see it.

I have used Spike it, works good. Haven't tried the other brand.