Missing "Wiki" link in some artist tags

Some artist tags have a "Wiki" link next to the "Posts" link while some don't. (See screencaps)

With Wiki link: http://i.imgur.com/2P0WnC8.png
Missing Wiki link: http://i.imgur.com/HdfLZy6.png

I would have posted this in here (forum #9127) but I wasn't sure if someone else already did. And I couldn't search because I don't know what terms I should look for.

That's because it doesn't have a wiki page. It's intentional.

Oh hey, you're right.

miwa_shirou's artist page and wiki page has the same content and I got confused.

But now i'm wondering. Why does the artist tag have it's own page AND a wiki page? other tags only have the wiki page.

Clicking an artist tag's "?" link takes you to an artist page, and there's also the "Wiki" link. While clicking other tag's "?" link takes you straight to their wiki page.

Is there some info exclusive to the artist page and some other info exclusive to the wiki page?

No, artist pages have everything on the wiki and more. But the extra information is more technical, allowing artist searches and the artist finder to work.