The same text style will not display the same height & width depending on what it's 'container' is. Text in schedules is about 3% narrower than if the same content is written in Text. See this post:
https://forums.autodesk.com/t5/revit-architecture-forum/schedules-and-text-display-different-text-wi...
Please make all text in a project display exactly the same, including but not limited to: Text, Schedules, Dimensions, Tags, etc.