Diode count isn't the only thing to consider. For one thing, they are using LM301B diodes instead of the LM301H diodes. People like to say they are the same diodes, which is only partially true. The fact is that the "B" diodes come in multiple bins, and the difference between top bin and low bin is around 15% light output. If you have top bin "B" diodes, then yes they are the same as the "H" diodes, because "H" only comes in top bin. Also the drivers they use in the Mars fixtures are typically less efficient. I'm not sure about the Inventronics driver they are using, but their "Meanwell" driver is around 5% less efficient than the XLG or HLG series Meanwell drivers. So, just those two facts right there, means the Mars light could easily be 20% less efficient than it's counterpart which uses quality components. 20% of 650watts is a 130watt difference. Big difference.
