The distinction between the Lightning Web Components and the Aura Components is only visible to those working behind the SCENES. However, Salesforce and the community recommend that developers use LWCs when building SPAs for the following reasons:

• Easy to Learn: LWC takes the form and fills it up using the browser's native web standards. This means that no additional distraction layer, such as Aura Framework or another framework, is required; all we need to BUILD is regular JavaScript.
• Higher PERFORMANCE: Because performance is vital to deliverability, LWC is LIKELY to render faster than the aura components in the absence of an abstraction layer.
• Sites LOAD Faster: LWC is a lightweight framework that loads built components quickly.
• Less Proprietary, More Standards: Because LWC has built-in browser security features from Web Components Standards, out-of-the-box modification is becoming less common.
• Components with no/little UI can be written in LWC, and those components can be reused in other components, making them more efficient than static resources.
• Easy to Learn for Developers: There is no need to learn any additional framework in order to construct LWC. As a result, the developers have an easier time.
• Security, Testing, and Browser Compatibility are all Improved: Script, CSS, and DOM isolation are better with LWC, and event scope is limited. We have more uniformity in the design of the components with each of these. In addition, LWC provides two-way data binding, which allows us to coordinate how data moves between different components.