Not much to go by there other then the Sea Hog looks like a Reef Octopus. What size system are these going on, what kind of bioload do you have, and what are the specifications for the skimmers you are looking at?
I think he has a 200 litr tank and is keeping fishes and LPS.
It was very surprising for me that the world has not used these skimmers but its now famous in the Iranian's aquarium systems.
Well, at least he Sea Hog if not a rebrand is at least a close clone to a common skimmer from China and distributed in the US by Coral Vue which is Reef Octopus. Which is pretty popular and a good skimmer.