Implementing Schema via GTM vs Wordpress

[ceeze]

I have a client who had local schema added via Google Tag manager. They have it where all URLs with a given city name will have the local schema for that office appear on the page. What I've found is that schema was also added manually to the pages by another agency, and now the client has 2 conflicting local schemas on the page. I'm going to remove one, but I was wondering if anyone thought one method of implementing schema was superior to the other - GTM or through WordPress.

 

[fisicx]

I try to create a schema for each page as it allows you to fine tune the properties - the automated tools often just go for the simple and less effective properties. One example of this is the use of the DUNS number - used rarely but a great schema property to add to your pages.