So it’s okay if I call my 70w HPS a 600w HPS? 
Just joking, call them whatever you want…
I personally don’t want to mislead people and just wanted to point that out in case you were not aware… I am a fucking smartass 
You can always see the actual draw of the lights with a draw meter, or for example Mars Hydro clearly displays the actual wattage on their site, as many other manufacturers do too. I wonder what is your “1600w”'s LED brand or manufacturer.
But I get it, you are not so interested in the details. You don’t have to be. 
I already thought before writing that you might know what I’m about to write, but wrote it more for the sake of newer growers who might not understand the LED light business so well yet.
The pictures of the past crop look really good. 
Are you going to do this test so that you gonna have the lights in separate spaces? Or just have those lights side by side in the same tent/space?
PS. For somewhat similar COB vs LED side by side in same tent comparison, check out my topic: Remove this part 7