The main difference between metal crowns and non-metal crowns is the material from which they are made. Metal crowns are typically made from gold, silver, or other metal alloys and are designed to match the color of your natural teeth. Non-metal crowns, on the other hand, are made from materials such as porcelain, ceramic, or resin and can be custom-made to match your natural tooth color.
Which one is more beneficial depends on your specific needs. Metal crowns are more durable and can last for a longer period of time, making them a good choice for molars and other heavily used teeth. Non-metal crowns, however, provide a more natural look and feel and are less likely to cause irritation to the gum tissue. Additionally, non-metal crowns are less likely to cause discoloration of the surrounding teeth. Ultimately, it is up to you and your dentist to decide which material is best for your teeth.