Crystal is better than glass because of the following reasons:
During the formation of the glass, a rapid method of melting known as quenching is used for arresting the kinetics of the system. This method of formation of glass results in a disordered structure of atoms as the atoms don’t have enough time for settlement.
Whereas the formation of crystals takes place under a slow process giving time for the atoms to settle resulting in a stable configuration.
Crystals have remarkable clarity while the glasses are foggy.
The working temperature of the crystal is relatively low while the working temperature of the crystal is high.
Therefore, these are the reasons why crystals are better than glass.