A logo (Greek λογότυπος = logotypos) is a graphical element, (ideogram, symbol, emblem, icon, sign) that, together with its logotype (a uniquely set and arranged typeface) form a trademark or commercial brand. Typically, a logo’s design is for immediate recognition, inspiring trust, admiration, loyalty and an implied superiority.  The logo is one aspect of a company’s commercial brand, or economic entity, and its shapes, colors, fonts, and images usually are different from others in a similar market. Logos are also used to identify organizations and other non-commercial entities.
A copycat is a person that mimics or repeats the behavior of another. The term is often derogatory, suggesting a lack of originality. The expression may derive from kittens that learned by imitating the behaviors of their mothers. – Wikipedia.
Plagiarism: The abuse of another’s original work by copying it and passing it off as one’s own. As defined in Alastair Campbell book titled The Designer’s Lexicon. Page: 293 ISBN: 0-304-35505-4.
“Imitation is the sincerest form of thievery” excerpt from a book by Capsule titled Design Matters. Page: 84. ISBN -13:978-1-59253-341-1.