Art after commerce

Here's a recent work made by Julius Popp, a German artist:



And here's a commercial product present since 1989:


Classic questions:
How much of the value is the originality of the project?
How much is there left for the concept? The execution? The richness of the universe that is being created? The "art codes"?
The bluff?
Should one stop/diverge a project upon realizing one is following another's path too closely?
This latter question is quite recurrent among many of the artists I know. Some opt for stopping, while others simply don't let go of their toy. After all, they say, isn't it always mine in the first place? Unintentional plagiarism? So what? If you focus on what you are, on your own path, shouldn't it always lead to an original work? In the best of possible worlds?