The Predators became widely available from wholesalers all at the same time so vendors scoped them up simultaneously. They're all first generation imports so you can't really attribute them to any one vendor. POTO calls them Funk Master, CaliKid calls them End Game, Predator just happens to be the most widely recognized name but it's all the same strain, all imported at the same time.
As to whether they're 'kraks,' it's 100% subjective. I'd say they have more in common with GMKs, adonis, rainbow mauls and flaming mohicans more so than say pink, or speckled kraks.
Legendary Corals consistently has neat stuff. I got a frag of their 'stardust' zoa recently and I'm in love. It's like a speckled outkast.