These two are a very interesting pair. I was actually very surprised at what I learned from this. Black Cat and Catwoman, it would seem, have everything in common. Being that Catwoman's first appearance predates Black Cat by almost forty years, and they are virtually the same character by today's standards, by proxy you would think that Black Cat is a complete rip off of Catwoman. This is actually a HUGE misconception. Let me explain. Back in 1979, Marv Wolfman was looking for a new villain for Spider-Man. He decided to base his creation off of an old Tex Avery cartoon called "Bad Luck Blackie". Bad Luck Blackie was a black cat that brought misfortune to anyone that was close in proximity. Black Cat is a cat burglar in the Marvel universe. She wears very low cut, tight leather costumes, a mask, and has claws at the tips of her fingers on her gloves. She is very nimble and agile, which helps her in her cat burglaries. She also has a love interest in Spider-Man.
At first glance, this sounds almost exactly like Selina Kyle's Catwoman. However,
at that time in Batman comics, Catwoman was only known as "The Cat" and she was nothing more than a pickpocket in a green dress with no mask. It was not until 1987 in Frank Miller's Batman: Year One, almost a decade AFTER Black Cat's appearance in comics, that Catwoman became the tight leather and mask wearing, clawed cat burglar that we know her as today. So if either of these characters are guilty of copying the other, one would have to say its Catwoman that is the copy-CAT. (See what I did there, again? I'm on a roll!) Mostly because at the time that Black Cat was created, she had almost no resemblance to the Catwoman in comics at that time. Presently both characters are identical. They are both high profile cat burglars that operate in tight leather, are extremely agile, and they are both love interests in their respective do-gooders lives. Pretty interesting, would you not agree?