| S.No | Aura Components | LWC |
| 1. | Development is aura framework-specific and has a .cmp file extension. | The Lightning Web Components are based on the 2019 web stack model, and it is a new programming model build on Web standards. |
| 2. | Aura components use the developer console to develop various use cases | They cannot be developed or edited in the developer console, requiring an IDE such as VSCode. |
| 3. | It uses Aura custom Events | It uses standard DOM Events |
| 4 | Attributes are defined in markup to hold different variable values | Instead of defining attributes in markup, they are defined in javascript, where the rest of the component logic is present. |
| 5. | To communicate between two DOM hierarchy Application, require Event is used | Whereas LWC uses Lightning Message Service to enable communication between LWC in different DOM hierarchy and also with Visualforce pages and Aura components |
| 6 | We can embed LWC in Aura | Aura cannot be embedded in Lightning Web Component |
| 7 | Data binding is bi-directional | Data binding is unidirectional |
| 8 | To pass information from parent to child component, attributes are used | Whereas it uses the property to pass information down to the child |
| 9. | Testing a bit painstaking | It is straightforward here.LWC has a potent tool, JEST, for testing. |
| 10 | Attributes need to be explicitly set using the component.set() to mention any change. | Changes can be observed using the @track decorator. |
Conclusion: Transition of Aura to Lightning Web Component has made significant changes in terms of better and efficient performance and has also increased the productivity.