In my opinion, Ahrefs works better for me than Moz, Ahrefs gives you a full picture of SEO,
1. Keyword research- It gives you the best data from KD to SERP analysis
2. Link building – cear picture on broken, new or lost links. your complete backlink profile.
3. you can do a content gap analysis with your competitors, and finally
4. Easy to use, you don’t need to watch a lot of tutorials to understand how to use it. very simple and precise with its results