Both work well; for a car display, flexible glass hybrids or thin foils are recommended, since touch sensitivity and easy cleaning matter most.
Tempered glass protectors offer the highest scratch resistance and a pleasant feel, though they're slightly thicker than a classic foil.
Classic screen protector foils are extremely thin, flexible and usually more affordable, with slightly lower scratch resistance.
- Flexible glass hybrids (e.g. AirGlass) combine hardness with minimal thickness
- Foils excel at maximum touch sensitivity and easy cleaning
For a car display like the Carpuride W702, drop protection isn't the priority anyway - frequent cleaning and reliable touch response matter more, and both material types are available for this device.