The savings you're claiming come from different driver efficiencies. People here use Meanwell drivers specifically because they're very efficient. I'm not seeing where your savings are coming from, either.
Running more COBs softer doesn't affect driver efficiency unless the driver is poorly sized for the application. The chips are more efficient, though.
I'm sure the SMD lights work similarly, so, again, not seeing where the improved efficiency is coming from?
'extraordinary claims require extraordinary evidence.' HLG doesn't claim their Quantum Boards are dramatically more efficient; they claim only an incremental improvement.
If you're claiming the same, then there's no problem. If you're claiming double, that definitely falls into the 'extraordinary claims' category.
A typical 200w cob setup uses a 1400mA driver with 36v cobs. It draws three amps to cover 2x2 with 200 watts. With A GG uses a 1050mA driver drawing two amps less amps same 200w .same coverage.
Two amps per hour is less than three amps per hour. More efficient use to cover 2x2 with 200w per hour. You are paying for the power supply on an hourly basis not the cob. The driver is connected to the wall. The lower operating amps of the driver means the driver makes less heat thru thermal resistance of the wire using the right hand rule for current. Less current less resistance greater efficiencies. Electronics operate more efficiently the cooler they are power supplies are no exception.
If you are running 240 320 and 480 drivers they are very large heavy because they use more amps.
All 185h drivers generate 200w at various current draws. The lower the amps the more efficient less heat. A 350mA can generate 200w but the Vf is 257v a 500mA is 400v a 700mA is 286v a 1050mA is 184v a 1400mA is 143v.
The lower amp rated drivers use less energy. The higher amp rated drivers use more energy to do the same watts.
You pay for amps used not volts used. Power is delivered at a constant voltage. You are charged by how many amps you carry on those constant volts 120v for usa or 240v commercial. 240v is more efficient than120v lower amps again.
A 1400ma current is heavier/more than a 1050ma current both traveling on a 120v circuit or a 240v circuit.
If you could choose you would choose the lowest rated amp products if you want a lower power bill.