It’s important to note that every tool utilizes its own unique approach to data collection and analysis, leading to variations in reported backlink numbers. GSC, in particular, only displays a sample of backlinks, and the absence of certain known links is expected.
The discrepancy in backlink counts between Ahrefs and Google Search Console (GSC) stems from differing crawling methodologies, indexing criteria, and data reporting practices. Ahrefs employs its own crawlers and incorporates a wider spectrum of links, potentially including those considered lower-quality by Google. GSC, on the other hand, may filter out these less-valuable links, presenting a more curated selection.