:::WP:CFORK isn't relevant here, since the article's isn't another take on the same topic, but instead a subtopic.  WP:NOPAGE is relevant, but it basically just says to use judgment in deciding when to split articles.  Basically, it is saying people should decide on a case by case basis whether a subject is better covered in one article or multiple articles.  I think in this particular case, the subject could be reasonably covered either in one article or in multiple articles.  I personally like having two articles as I think being able to provide extra details is good in this particular case.