They are different but certainly not incompatible.
If Roman culture had been a continuous force in Europe, that might be said. However, after the Germanic invasions, Europe went right back to the Iron Age level of civilization that had existed before Rome invaded. The Roman language, literature, architecture, political system, and the like had a greater impact on Europe during the Renaissance than it did under Roman occupation. Petrarch did more to Romanize modern Europe than did Caesar.