Answer:
The two key differences were:
1. The difference in perception, and the way the artist sees the picture or the event. It was very different in both these styles.
2. A more the theatrical approach was seen in the Mannerist style, as opposed to a more realistic, yet idealist approach in Renaissance art.
Step-by-step explanation:
The Mannerist style came after the great years of the High Renaissance artistic period. During the Renaissance artists were approaching the subject of classical antiquity and biblical stories in a new dramatic way.
The aim was to create realistic yet ideal perception of the world.
Mannerist style developed after these great years, consisted on a more theatrical lightening, a setting that seemed more dreamy but the overall perspective provided even more realism.
After the great Renaissance artists such as Leonardo and Michelangelo, it was not easy for more modern artists to develop a new art form. The Mannerist style is now seen as a more natural progression on the development of arts in medieval Europe.
Similar to the birthplace of Renaissance, this new art form developed in the great cities of Florence and Rome and inspired a generation of new artists throughout Europe.