It depends. The answer comes down to your specific requirements.
Both are content management systems used to build and manage websites.
Statamic stands out for its ease of use and high flexibility for developers. It is well-suited to projects with bespoke or highly specific requirements.
WordPress, on the other hand, is widely adopted and offers an extensive library of themes and plugins, making it possible to achieve a great deal without a developer. The downside is that plugins frequently introduce security vulnerabilities, which, given WordPress's popularity, has led to it regularly making negative headlines.
Ultimately, the right choice depends on your specific needs, technical capabilities, and preferences.