Although the two portraits shown are different, what overall message do they have in common?

Assuming that you're referring to two portraits of medieval leaders which i will upload, the things that they have in common are :
- Both potraits shows significance
- The artists have painted each fiture with exaggerated feature and overall size to display powerful presence to create division between them and common people
- Both the portraits shows the men as superior leaders and powerful figures

hope this helps