How does the link in the h1-h3 headings affect SEO optimization?

Question

Search Engine Optimization

Imagine two identical sites, on the first: On the second: Who will be given preference?
<h1>Заголовок</h1>
<h1><a href="/test/">Заголовок</a></h1>

Answer 1

Any link is an inline element, so the same rules apply to it as for inline elements. Namely, you cannot place block elements inside the tag, but it is permissible to do the opposite and ...

Answer 2

Like the title should be the title.
I would do so

<h1 onclick="window.location.href='/test'">Header</h1>