"Protection from Others' Mistakes" covers only the risks of accidents involving two or more vehicles and covers the repair costs for your car within the chosen limit if your driver is not at fault for the accident.
Casco is a more comprehensive insurance that covers a wide range of risks, including damage to your car regardless of who is at fault for the accident, as well as risks such as theft, fire, natural disasters, and other unforeseen situations. Payouts under such a policy are based on the market value of the car.