When I looked into it while starting a new project about a year ago, Axum seemed like the framework with the most inertia. I think there was some concern a year or two back about whether Actix would continue to be maintained, but it looks healthy now.

They're probably both fine choices, I chose Axum because the middleware architecture was easier to grok and at the time I felt that staying under the tokio umbrella would be safer long term.