Why would you say that people trust one more over another? Both Predator and Bustin have excellent reputations and baits. From what I can tell, H2O baits are no different than theirs. They just come painted. A knock is a knock off is a knock off.
I can only speak for my business here. We have an Academy Sports here and it is much easier to sell a known product over an unknown. Plus I can tell you from experience the H20 always runs true and I can't say that about the others I've tried. I still buy from the little guys because you can't beat the prices but for a tourney guy that wants the sure thing I will use the H20.