Seems like Nivea is being dishonest in terms of stating that their blades are being received well by the customers. We'll need a lady volunteer to review these for us
I don't think Gillette would worry on competition coming from a one particular brand, but yes, they might be worried on too many other cheaper options popping out one after another in blade's market. But that is my assumption, of course.
Are they cheaper? I can't find Gillette's triple blade disposables, but the Wilkinson Sword and the Gillette twin blade products are not too far off sterling prices.