What is the difference between two editions of the same Spiderman Comic book?

I have two editions of Spiderman Legend of the Arachknight part 1 of the torment series. One of the comic books is a regular looking cover with regular coloring, and the other is black and gold. Can anyone tell me the difference as far as which one is more rare, and a possible price range if I decide to sell them.

The difference between the two covers is that they are separate print runs. That particular issue had one of the highest print runs ever and almost all of them are pretty much worthless. To find out which print run you have based on the colors on the cover, you can check out this website:
http://www.comicspriceguide.com/p-issues.asp?t_ID=3350

Certain comics will sell out right away usually because there turns out to be a greater demand for them that what the comic publisher was expecting. When that happens they will usually print a second run of the same comic so that the people that missed out on them the first time can get a hold of the issue. Sometimes there will only be subtle changes with the cover like Spider-Man #1 or there are entirely new covers which is what has become common today.

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