Plugin that helps move content from one WP site to another?

Hello! Can someone recommend a plugin that helps move content from one WP site to another? Both are maintained and owned by me, I hold all keys and control. However, there is a lot of content, themes are different, and overall organization distinct between the two. I tried several solutions, non that produced reliable results. Any help with this?

Duplicator plugin is best when moving content form one WP site to other. I have personally used this plugins and it works well.

Before using, make sure that you view its official demo video at plugin page here.