Roku Smart TV – 50-Inch Select Series, 4K HDR TV – vs VIZIO 40-inch D-Series Full HD 1080p Smart TV with
Updated August 2026 — Roku Smart TV – 50-Inch Select Series, 4K HDR TV – wins on display and smart features, VIZIO 40-inch D-Series Full HD 1080p Smart TV with wins on gaming and price.
The Roku Smart TV offers superior display quality and extensive smart features, while the VIZIO D-Series excels in gaming performance at a lower price.
Why Roku Smart TV – 50-Inch Select Series, 4K HDR TV – is better
Display Quality
Roku offers 4K resolution with HDR.
Smart Features
Roku provides access to over 500 channels.
Voice Control
Roku has extensive smart home integration.
Why VIZIO 40-inch D-Series Full HD 1080p Smart TV with is better
Gaming Performance
VIZIO features a V-Gaming Engine.
Price
VIZIO is approximately 17% cheaper.
Size
VIZIO has a more compact 40-inch size.
Overall score
Specifications
| Spec | Roku Smart TV – 50-Inch Select Series, 4K HDR TV – | VIZIO 40-inch D-Series Full HD 1080p Smart TV with |
|---|---|---|
| Resolution | 4K | 1080p |
| HDR Support | Yes | No |
| Voice Assistant | Siri, Alexa, Google | Alexa |
| Gaming Features | No | Yes |
| Channel Access | 500+ | Limited |
Dimension comparison
Display Quality
When it comes to display quality, the Roku Smart TV boasts a sharper 4K resolution compared to the VIZIO's Full HD 1080p. The Roku Smart TV enhances viewing experiences with HDR10 technology, which brings lifelike colors and rich detail to its 50-inch screen. This feature is particularly significant for viewers looking to get the most out of their streaming content. On the other hand, while the VIZIO 40-inch D-Series provides a clear 1080p picture, it lacks the advanced color detailing offered by HDR. The difference in resolution means that the Roku Smart TV is likely to provide a more immersive viewing experience, especially for high-definition content.
Smart Features and Interface
The Roku Smart TV excels in its smart features, providing access to over 500 channels, including live shows and movies. Its user-friendly interface allows easy navigation through various applications, ensuring that users can quickly find their favorite content. Additionally, the enhanced voice remote allows for seamless voice search across thousands of apps. In contrast, the VIZIO D-Series offers SmartCast, which gives access to popular streaming apps, but it may not match the extensive free content available on Roku. The Roku's automatic software updates mean that users will consistently receive new features, keeping the experience fresh and engaging.
Gaming Performance
For gamers, the VIZIO D-Series stands out with its V-Gaming Engine, which optimizes picture modes for gaming and supports features such as Variable Refresh Rate with AMD FreeSync. This makes it a compelling choice for those who prioritize gaming performance. The Roku Smart TV does not specifically highlight gaming features, making it less suited for dedicated gamers. While both TVs offer different strengths, the VIZIO’s focus on low input lag and gaming enhancements makes it a better option for gaming enthusiasts.
Voice Control and Smart Home Integration
The Roku Smart TV offers extensive voice control capabilities with compatibility for Siri, Alexa, and Google Assistant. This integration allows users to control their TV with ease, making it a great fit for smart homes. The enhanced voice remote is particularly notable for its lost remote finder feature, which adds a layer of convenience. While the VIZIO D-Series also supports voice control through Alexa and Apple AirPlay, it does not highlight the same level of integration and user-friendly features as the Roku. Thus, for users who value voice control and smart home compatibility, the Roku Smart TV may have the edge.
Price Comparison
In terms of pricing, the Roku Smart TV is currently priced at $229.99, while the VIZIO D-Series comes in at a lower $188.98. This makes the VIZIO approximately 17% cheaper than the Roku. However, the price difference reflects the varying features and display capabilities. While the VIZIO offers good value for its price, particularly for gamers, the additional cost of the Roku Smart TV can be justified by its superior 4K resolution and extensive smart features.
Brand Reputation and Sales Rank
Both the Roku Smart TV and VIZIO D-Series are from well-known brands in the television market. The Roku Smart TV has a sales rank of 2783, while the VIZIO D-Series has a slightly better sales rank of 2930. Despite the Roku's higher price point, its sales rank indicates a strong appeal among consumers who are likely drawn to its advanced features and 4K capability. The VIZIO's sales rank also points to its popularity, especially among those looking for a cost-effective yet capable smart TV.
User Experience and Ease of Use
The Roku Smart TV is designed with user experience in mind, featuring an intuitive interface that makes it easy for anyone to navigate through apps and settings. Its simplicity allows users to enjoy their favorite shows and movies without unnecessary complications. In contrast, the VIZIO D-Series, while also user-friendly with SmartCast, may not offer the same level of ease in finding and accessing content. The Roku’s well-established ecosystem and automatic updates further enhance the user experience, making it a preferable option for those who want a hassle-free viewing experience.
Which should you buy?
When deciding between the Roku Smart TV and the VIZIO D-Series, it ultimately depends on your priorities. If you are looking for a television with superior display quality, extensive smart features, and robust voice control capabilities, the Roku Smart TV may be worth the extra cost. However, if gaming performance and a lower price point are more important to you, the VIZIO D-Series offers compelling features at a more affordable price. Regardless of your choice, both televisions provide solid performance, making them worthy contenders in the smart TV market.

