Aqueon modualar led vs Marineland singlebright

Unless you can either find someone who happens to own both fixtures, or visit a store that will let you demo both fixtures, I'm not sure you're going to be able to get a reliable answer, unfortunately. I did some searching, and found that the Marineland single bright fixture comes in 300, 400, and 600 lumen models (which are the 18-24", 24-36", and 36-48" models, respectively), but I couldn't find technical specifications for the Aqueon modules anywhere -- not even on Aqueon's website.