Glass Lens Holga vs Plastic Lens Holga
There is in fact not much of a great deal of difference between the glass lens Holga and plastic lens Holga. Being a cheaply manufactured camera, the images you get can vary from camera to camera and it will be difficult to find a definite answer as to which one is better and in what way.
In general, it is believed that the glass lens gives slightly sharper images, whereas the plastic lens gives a bit more vignetting around the corners, and slightly more blurry and distorted photo. There isn't a big difference in the colour rendition and contrast in either lenses. One would believe the glass lens is a bit more durable, but the plastic isn't badly built either. After all, it's purely a matter of personal preference.