You can check airflow specs and designs if you need data, but that won’t tell you what the best skimmer is. The is my option based on my use with them and other skimmers as comparison. Bubble kings are just the most trouble free, silent, consistent skim, lowest pump maintenance skimmer that I’ve ever used. I think many would agree.
As for the aquamax, its good, not perfect. It lacks fine tuning ability on airflow which is easily fixed by adding a needle valve. The pump can also require more frequent cleanings to perform optimally. All in all it’s a powerful skim for the price. Better than a detect hob skimmer that I had which was more than double the price.