What are the similarities and differences between crystalline and amorphous materials during melting and solidification?

Solids are divided into two categories: crystalline and amorphous. Both crystalline and amorphous need to absorb heat when melting, but the temperature of amorphous will rise when the crystal temperature remains unchanged;
Solidification is a process of exothermic cooling. Crystals have certain freezing points. There is also a section in the image that is horizontal. Amorphous crystals do not have certain freezing points. They are exothermic, cooling, and freezing at the same time.
During melting:
Similarities: both absorb heat;
Difference: the crystal absorbs heat in the melting process, and the temperature remains unchanged; Amorphous crystals absorb heat and increase temperature in the melting process;
During solidification:
Similarities: heat shall be released;
Difference: the condition of crystal solidification is that the temperature reaches the freezing point, and the temperature is constant during solidification; Amorphous crystals do not have a certain freezing point. With the decreasing exothermic temperature, they change from liquid to solid.