The ranking difference between Ahrefs and Google Search Console (GSC) can vary due to several factors:

Data Sources: Ahrefs and Google Search Console use different data sources to track rankings. Ahrefs primarily relies on its own web crawler to index and track website data, while Google Search Console provides data directly from Google's search index. This can lead to discrepancies in the rankings reported by each platform. Sampling and Accuracy: Google Search Console provides data directly from Google, so it can offer more accurate insights into how your website is performing in Google's search results. However, GSC data may be sampled, especially for larger websites, leading to potential inaccuracies in the reported rankings. Ahrefs, on the other hand, may provide more comprehensive data but might not always perfectly align with Google's rankings due to differences in algorithms and data collection methods. Metrics and Granularity: Ahrefs typically provides more granular data and a wider range of metrics than Google Search Console. While GSC focuses on basic metrics like clicks, impressions, and average position, Ahrefs offers additional metrics such as organic traffic estimates, keyword difficulty scores, and backlink data. This can result in differences in the rankings reported by each platform, as they may prioritize different metrics or calculate rankings differently. Updates and Delays: Ahrefs updates its database regularly, but there may still be a delay between changes in rankings and when they are reflected in the platform. Google Search Console also updates regularly but may have its own delays in reporting data. This means that rankings reported by each platform may not always be up-to-date or perfectly synchronized.