| Structs are value-type entities stored in stack memory. | Class is a reference type entity stored in heap memory. |
| Allocation and de-allocation of Structs are cheaper when the size of the Structure is small. | Allocation and de-allocation of Classes are costlier when the size of the class is small. |
| Allocation and de-allocation of Structs are costlier as compared to classes when the size of a struct is large. | Allocation and de-allocation of Classes are cheaper as compared to Structs when the size of the class is large. |
| Structs can contain limited kind of entities like variables, structs, etc, and hence is used to create smaller codes. | Classes can contain all kind of entities like variables, functions, constructors, structs, etc, and hence is used to create large codes efficiently. |
| Structures are not allowed to contain parameterless constructors or destructors, but only parameterized constructors and static constructors. | Classes can contain any kind of constructors or destructors. |
| An instance of a struct can be created by using the new keyword, as well as without using a new keyword. | To create an instance of a class, a new keyword is used. |
| A Struct cannot implement Inheritance and hence cannot inherit another struct or class. | A Class can implement Inheritance and can inherit from another class. |
| The attributes of a struct cannot be specified as protected. | The attributes of a class can be specified as protected. |
| A struct can neither have a virtual method nor an abstract method. | A class can have virtual methods as well as abstract methods. |
