Blueline-Pan-World was started by the former chief designer for Iwaki. They license their pumps under various importer. One of them happens to be Coralife.
If you check the flow rates ands wattage used the line up are almost completely the same.
Pan World Magnetic Water Pumps (PX & PS) - Marine Depot - Marine and Reef Aquarium Super Store Aquarium Water Currents & Movement: Coralife Turbo-Sea External Pumps
I own the Coralife TubroSea 1090GPH. If you get to see the pump first hand you see the red paint job and the coralife badge on top of it and the PanWorld 50PX-X lable on the bottom of it. Companies are not generally to up front with these deals as the importer generally wants to give the illusion that there the off-shore manufacterer.