XSD - Similar types with few differences?

I am pretty new to XSD but it’s been interesting working with and learning more

say I have a ComplexType <Article> which has a <Image> element which will be there, as a URI, always.

Then I have a feed where someone can SUBMIT an article. In this <Article> ComplexType, The <Image> doesn’t exist - in fact it would just be ignored.

So the first would be a feed of “Here are the articles” while the second is submission of an article in XML format. They are so similar but there are some minor, yet important differences. Is there any way to have these differences under one ComplexType, or do I need to create two? My worry with the latter option is keeping both up to date/consistent