Correct me if I'm wrong, but my impression is all of these Egos, 510s, 901s, etc., are made from the same manufacturer in China. The ones called generic, ie, no logos, are directly purchased from the same country. They are branded by dealers outside of that country.
Some entrepreneurs outside of China like Canada, US, Europe, etc., don't even have to bother about shipping, packaging, taking orders, etc. All they do is come up with an online store and the transaction is taken over by dealers in China. I bought some of my kits from a site identifying itself as a Canadian store and expected my orders to be shipped from some location in Canada. It turned out that the products' origin upon shipping is China. You could see this when tracking your orders. I paid double the price of the same items if purchased from a Chinese site. Plus I didn't have to pay taxes.
;-)