Brown's gas differs from Aquygen (HHO) atomically, not chemically. The binding is magnetic, not the traditional covalent bond that you're used to. They refer to the resulting gas as "magnecules"
Everyone is partly right. You can't produce liters of the stuf in a few minutes, nor would you want to. Check your notes from history class and look under "Hindenburg" That's also why the gas is produced on demand rather than shipped in tanks (that and the weird magnetic properties make it bond to the tank-in theory- and things get messy).
I'm not a chemist, physisist or engineer, I work in an office and if I get caught in this thread I'll get fired. I'll check back in a few days to answer questions.