Comment by swores

When the two submissions aren't the exact same link, it becomes a subjective question as to whether they're similar enough to count as a dupe or not. They aren't automatically always a dupe just because the overall general topic is the same, but nor are they automatically considered not a dupe just because they're not identical.

In this case the consensus (that I agree with) certainly seems to be that they're similar enough to be considered a dupe. Though that doesn't force the moderators to have to treat it like a dupe and merge comments.