Ummmm
Yeah, it certainly looks like one of them ripped of the other.
I love when they do this in movies and games, especially if it is done well enough for you to miss it at first.
Actually... if both are from Robert Kinoshita, it could be just recycling :P
... and now i need to watch Tobor... it's more than 50yo, with a little luck it has a public domain release on archive dot org.
I agree though, i love ripoff-yet-not-traced artworks.