Casio PX-870 Privia Digital Piano - Black Bundle vs UMOMO 88 Weighted Key Digital Piano with Duet
Updated August 2026 — Casio PX-870 Privia Digital Piano - Black Bundle wins on features and sound quality, UMOMO 88 Weighted Key Digital Piano with Duet wins on value.
The Casio PX-870 offers superior sound quality and features, making it the better choice for serious players, while the UMOMO is a budget-friendly option for beginners.
Why Casio PX-870 Privia Digital Piano - Black Bundle is better
Sound Quality
Casio has a powerful 4-speaker system for immersive sound.
Key Action
Casio features advanced key action for a more authentic feel.
Features
Casio includes extensive educational tools and accessories.
Why UMOMO 88 Weighted Key Digital Piano with Duet is better
Price
UMOMO is significantly cheaper at $399.98.
Portability
UMOMO is designed for easy assembly and transport.
Basic Features
UMOMO offers essential features for beginners.
Overall score
Specifications
| Spec | Casio PX-870 Privia Digital Piano - Black Bundle | UMOMO 88 Weighted Key Digital Piano with Duet |
|---|---|---|
| Keys | 88 weighted | 88 weighted |
| Tones | 19 | 128 |
| Polyphony | 256 | 128 |
| Speakers | 4 speakers | not specified |
| Accessories | included | not included |
Dimension comparison
Price Comparison
The Casio PX-870 Privia Digital Piano is priced at $899.00, while the UMOMO 88 Weighted Key Digital Piano is significantly cheaper at $399.98. This means the UMOMO is about 56% less expensive than the Casio. For beginner pianists or those on a tight budget, the UMOMO offers a more accessible entry point into digital pianos without compromising on essential features. However, the Casio's higher price reflects its advanced technology and additional bundled accessories, making it a more robust option for serious players.
Sound Quality
When it comes to sound quality, the Casio PX-870 is designed to deliver an immersive audio experience with its powerful 4-speaker system that projects sound dynamically throughout the room. It boasts a new piano sound with detailed resonance, making it ideal for performance settings. In contrast, the UMOMO features an advanced sound source with 128 tones and a variety of sound effects, but it does not specify the same level of sound projection or speaker system. For audiophiles or those looking for a rich, full sound, the Casio likely provides a superior experience.
Key Action and Feel
The Casio PX-870 features 88 scaled, weighted hammer-action keys with simulated ebony and ivory textures, providing an authentic playing feel that closely resembles an acoustic piano. This design is complemented by adjustable touch sensitivity and hammer response, allowing customization for various playing styles. The UMOMO also includes 88 fully weighted hammer action keys, but it mentions only 10 gradations in weight, which may not offer the same level of nuance as the Casio's advanced key action system. For players who prioritize key feel and expressiveness, the Casio is likely to be the preferred choice.
Features and Functionality
The Casio PX-870 is equipped with a variety of features such as recording capabilities, a built-in music library of 60 songs, and Duet Mode for teacher-student interaction. Additionally, it includes several accessories like headphones and an instructional book, significantly enhancing its value for beginners. The UMOMO offers a range of features too, including 80 demo songs and the ability to connect to MIDI devices for music production. However, it lacks the comprehensive educational tools found in the Casio, making it less ideal for serious learners looking for extensive functionality.
Design and Aesthetics
In terms of design, the Casio PX-870 comes in a stylish, modern wooden cabinet available in black, oak, or white finishes, making it a visually appealing addition to any room. Its sliding key cover adds both elegance and practicality. The UMOMO, while functional, is more utilitarian in design and does not emphasize aesthetic appeal to the same extent. Those looking for a digital piano that doubles as a piece of furniture may find the Casio's design more appealing.
Portability
The UMOMO digital piano is built with portability in mind. It is described as easy to assemble, which can be advantageous for those who need to move their instrument frequently or set it up in different locations. The Casio PX-870, while not specifically designed for portability, offers connectivity options via USB to various devices, enhancing its functionality in different settings. However, if you need a lightweight and easily transportable option, the UMOMO could be the better choice.
Brand Reputation
Casio is a well-established brand known for its quality musical instruments, and the PX-870 has a sales rank of 13,806, indicating its popularity among users. UMOMO, while offering competitive features at a lower price point, has a sales rank of 15,742, suggesting it is slightly less favored in the market. Brand reputation can often influence purchasing decisions, particularly for serious musicians who value reliability and quality in their instruments.
Which should you buy?
Choosing between the Casio PX-870 and the UMOMO 88 Weighted Key Digital Piano ultimately depends on your specific needs and budget. If you are a beginner looking for an affordable yet capable digital piano, the UMOMO at $399.98 is an excellent choice, offering essential features and a satisfactory playing experience. However, if you are a more experienced player or someone who values sound quality, key action, and additional features, the Casio PX-870 at $899.00 is worth the investment. It provides a more authentic piano experience, extensive functionality, and a premium aesthetic that can enhance both your playing and your space.

