This supposition is only correct if you have visibility into the product development timelines of each company.

Just because Apple releases a watch 6 months after Samsung, that does not mean that they started working on it 6 months after Samsung did. It's possible that Apple has been working on a watch concept for years, and Samsung rushed theirs out the door when the rumors got louder.

That's probably why you're getting downvoted. You're drawing conclusions solely from the public launch date of things, which actually don't tell us much about who is copying whom.