Search engines will treat http://www.hugon.ws and http://hugon.ws as two separate websites. Search rankings are surely going to drop, given that search engines believe that 2 sites should share the benefit of having the same content.
The solution is quite simple: HTTP 301 redirect http://hugon.ws to http://www.hugon.ws with a rewrite rule:
<rule name="Canonical Host Name" stopProcessing="true">
<match url="(.*)" />
<conditions>
<add input="{HTTP_HOST}" negate="true" pattern="^hugon\.ws$" />
</conditions>
<action type="Redirect" url="http://www.hugon.ws/{R:1}" redirectType="Permanent" />
</rule>Below is a screen shot of the Edit Rule UI in IIS:
