Is Hatsune Miku The Nyan Cat?

Excuse me, but could you please clarify something for me? I've come across a rather curious question that's been puzzling me lately. Is it accurate to state that Hatsune Miku is the same as the Nyan Cat? These two seem to exist in vastly different realms, with Hatsune Miku being a popular virtual singer and Nyan Cat being a beloved internet meme. Could you shed some light on this matter and help me understand if there's any connection between the two, or if this is simply a case of mistaken identity? Thank you in advance for your assistance.