The main difference between a glass made aroma diffuser and a polyresin made aroma diffuser is the material used to construct the diffuser.

Glass aroma diffuser is typically made of high-quality glass and is often more fragile than a polyresin diffuser. Glass diffusers can come in a variety of shapes and sizes and are often more aesthetically pleasing than polyresin diffusers. Glass diffusers are also often more transparent, allowing you to see the water and essential oils inside.

Polyresin aroma diffuser on the other hand, is typically made of a durable and sturdy synthetic material that is designed to mimic the look and feel of natural materials like stone or wood. Polyresin diffusers are often more affordable than glass diffusers and are less likely to break or crack. However, they may not be as visually appealing as glass diffusers.

In terms of functionality, both glass and polyresin aroma diffusers work in essentially the same way. They both require water and essential oils to be added to a reservoir and use ultrasonic vibrations to disperse the scent into the air.

Ultimately, the choice between a glass or polyresin aroma diffuser comes down to personal preference and the desired look and feel of the diffuser.