HHO vs water vapor injection

[flapdoodle]

I received a phone call from a fellow HHO experimenter who says he is removing his website and dropping HHO in favor of water injection. He claims WI is just as effective without the hassle and expense.

I have tried both systems, but not at the same time. Has anyone heard any credible evidence that would support the claim that WI is just as good as HHO?