Silver Line-TDK - The same?

Hello =)

Well, as the topic implies, I’ve been said that both Silver Line and TDK has the same Manufacturer, which is Ritek. So, in case I want to buy TDK quality, I should buy Silver Line which is only cheapier

According to what I’ve seen here, it is wrong, but I may be the one who’s wrong.
So, what do you think?