Schema App

Since the websites we manage are on Wordpress and we also using Google Tag Manager I have the option of using either method of implementation. My question is, is there one that is recommended over the other and why?

Thanks!

Through WP plugin, you have the ability to assign schema types to your various post types  as well as enhanced options if you created custom post types.  I don't expect this would be as easy (or possible) through GTM implementation.