Organic Keyword difference between Ahrefs and Semrush?

Is anyone else getting a large difference in the amount of keywords each of these tools finds for the same site? I plugged in my client's site on semrush and it shows the site is ranking for 45 organic keywords. I check Ahrefs and it's showing ranked for 120 organic keywords. Why such a large difference?

in semrush give only the domain name & nothng else. Even then semrush show less kw than real ranking kw

so then it is better to use ahrefs to check keyword rankings?

Use both of the services to acquire the ranking keywords and use serpbook or serplab to monitor your keyword rankings.