It most likely does get made in same factory. If you have alternatives then let us know. There are only so many suppliers on the market.
I recently made a choice for EK over Alphacool. I have both of their products in my current build but I went for the EK product over the Alphacool product for aestetcic reasons.
If you have issues with certain brands give relevant alternatives and reasons. I am not knocking you here I want options so I can choose the best one.