That's not really fair lads. Korda designed both products, came up with the materials, determined how they could be made, designed tooling, and went through all the prototype phases. That is a process that takes many, many months and costs a hell of a lot. I know that because the company I work for design and manufacture products.
NGT then essentially steal the designs (they can't be patented) and have them made for as cheap as possible to undercut them. So it's not really a case of NGT simply buying from the same factory, they are taking advantage of others hard work to make a quick buck for themselves.