Listicle pages: Ordered List vs Heading/Paragraph

For Listicle style articles, does Google prefer Ordered Lists over a list of Heading+Paragraphs? Are there any advantages or does Google only process the text? If possible, cite your source.

Ordered List example:

<ol>    <li>    <p>Topic1</p>    <p>Facts/Discussion</p>    </li>     <li>...</li> </ol> 

Heading+Paragraph example:

<h2>Topic1</h2> <p>Facts/Discussion</p>  <h2>...</h2>