For all you know, maybe there's a "turnkey" business setup in/near Shenzhen where boardhouse/fab/electronics/bandaid/food zaibatsu-like companies all sell nearly the exact same package from the same software company (themselves) that sets up a website (using identical templates), funnels the orders back to the companies doing the manufacturing and shipping, the money back to other places (plus a bit for Party, ya know), leaving a little remainder for the guy running the place (who, if he gets "outta line" - is replaced by someone just as eager as he was).
The Things you refer to always happen in consumer electronics market like cellphone,MP3 player , GPS and so on. But in the market of electronic components , because the products have not significant differentiation, so if use the same webshop platform you will find them like a copy-- Especially using the same template.