I did a full test about two years ago across a few sites. Compared SEMRush vs Ahrefs and added the GSC data as well for reference. Posted it on another forum, here:What specific areas did SEMrush outperform Ahrefs in when you tested them head-to-head? Was it keyword data, backlink analysis, site audits, or something else? Always looking to understand these comparisons better.
Code:
https://www.blackhatworld.com/seo/which-is-better-semrush-vs-aherfs-comparison.1515359/