backrefs vs ahrefs

https://wiki-dale.win/index.php/How_Backrefs_for_SEO_Can_Transform_Your_Link_Building_Strategy

The main difference between backrefs and ahrefs is their structure: backrefs use a backslash followed by a number to match previously captured groups in a regex, like \1 for the first group, while ahrefs are literal characters or patterns meant to match anchor tags in HTML. Backrefs are dynamic, relying on captured content within the same expression, whereas ahrefs simply match fixed text like 'href' without any back-referencing logic.