definitely similar
but i'd also say it's different "enough".
x-men wrote: "originally aired on October 31 and November 7, 1992"
i'd bet if you set a simple harvester to gather theme songs from all the shows of a given era (these aired <10 years apart?), you'd find a ton of apparent plagarism.
with that, if i code something to "write" songs like this and publish the 1,000,000 generated songs, do i get royalties/law suits galore?
where does it end? in a court, i expect...
btw, i'm sure i'm clueless here but are either of those so dificult to compose? most things are written by folks who were influenced by something (many things) they've heard before, so... influence vs willful, blatant plagarism.
that said, every metal song (most of what i listen to) owes something to black sabbath. and they owe plenty to those that influenced them. isn't this the way of things? so, enter $$ and here we are.
(and don't get me started on "sampling")
it's a wonderful world