hmkay, well, it's quite easy to get a page to use a different style.
1) install freddie's User's Style in Post hack;
2) set the variable $changestyle with a styleid of choice _before_ including global.php in the file
you can pass the variable through the URL also...
So then you can send people from each category to see it in that cat's style. But note that each of them will still see the exact same _content_, just not in the same style