Schema styles...

When defining a Schema it seems to me that most of the context is in the 
XML-Schema namespace, so I keep wondering why there seems to be a 
preference for qualifying the XML-Schema namespace rather than the 
defined namespace, i.e.

<xs:schema xmlns:xs="http://www.w3.org/2001/XML-Schema" 
xmlns="urn:MyContext" targetNamespace="urn:MyContext">
  <xs:simpleType name="MyType">
    <xs:annotation>
      ...
    </xs:annotation>
    ...
  </xs:simpleType>
  <xs:element name=""myType" type="MyType">
    <xs:annotation>
      ...
    </xs:annotation>
  </xs:element>
</xs:schema>

rather than the (to me, at least) cleaner appearing

<schema xmlns="http://www.w3.org/2001/XML-Schema" 
xmlns:my="urn:MyContext" targetNamespace="urn:MyContext">
  <simpleType name="MyType">
    <annotation>
      ...
    </annotation>
    ...
  </simpleType>
  <element name="myType" type="my:MyType">
    <annotation>
      ...
    </annotation>
  </element>
</schema>

Is there some significant difference in the result?