Casio Privia PX-870 – 88-Key Weighted Console vs Donner DDP-90 Pro Digital Piano, 88 Key Weighted
Updated August 2026 — Casio Privia PX-870 – 88-Key Weighted Console wins on sound and features, Donner DDP-90 Pro Digital Piano, 88 Key Weighted wins on portability and weight.
The Casio Privia PX-870 offers superior sound quality and features, making it ideal for serious musicians, while the Donner DDP-90 Pro is a more affordable option for beginners.
Why Casio Privia PX-870 – 88-Key Weighted Console is better
Sound Quality
Casio features advanced AiR Sound Source technology.
Key Action
Casio has a superior Tri-Sensor II Scaled Hammer Action.
Features
Casio includes duet mode and a MIDI recorder.
Why Donner DDP-90 Pro Digital Piano, 88 Key Weighted is better
Price
Donner is significantly cheaper.
Portability
Donner is smaller and lighter.
Song Library
Donner offers more tones and rhythms.
Overall score
Specifications
| Spec | Casio Privia PX-870 – 88-Key Weighted Console | Donner DDP-90 Pro Digital Piano, 88 Key Weighted |
|---|---|---|
| Price | $999.00 | $499.99 |
| Speakers | 40W | 20W |
| Polyphony | 256 | 128 |
| Keys | 88 | 88 |
| Tones | 18 | 238 |
Dimension comparison
Price Comparison
The Casio Privia PX-870 is priced at $999.00, while the Donner DDP-90 Pro comes in at $499.99, making the latter about 50% cheaper. For beginner pianists or those on a tighter budget, the lower price of the Donner DDP-90 Pro may be more appealing. However, it’s important to consider what features you are willing to sacrifice for that price. The Casio offers a premium sound and build quality that might justify the higher investment for serious players.
Sound Quality
For sound quality, the Casio Privia PX-870 stands out with its AiR Sound Source technology, providing an immersive grand piano sound with detailed resonances and simulations. It features a powerful 40W sound system that delivers rich sound projection. In contrast, the Donner DDP-90 Pro also offers quality sound samples from real acoustic grand pianos but at a lower wattage and polyphony of 128. While both pianos deliver satisfactory sound, the Casio is designed for those who prioritize a concert-like experience.
Key Action and Feel
The Casio Privia PX-870 boasts an impressive Tri-Sensor II Scaled Hammer Action keyboard, which simulates the feel of an acoustic piano with ebony and ivory textures. This feature allows for superior dynamic control and expression. On the other hand, the Donner DDP-90 Pro features an 88-key weighted keyboard designed to inspire beginners with its responsive hammer action. While both keyboards provide a weighted feel, the Casio's advanced action may cater better to those seeking a more authentic piano experience.
Features and Functionality
The Casio Privia PX-870 is packed with features that support both learning and performance, including duet mode, a MIDI recorder, and 60 built-in songs. It also allows for easy connectivity with devices via USB-MIDI. The Donner DDP-90 Pro, while less feature-rich, offers 238 tones, 200 rhythms, and 100 songs, making it a versatile option for beginners. Both pianos support headphone modes for quiet practice, but the Casio's additional performance features may be more beneficial for advancing players.
Design and Aesthetics
In terms of design, the Casio Privia PX-870 presents a sleek and stylish console that complements any decor. Its modern design includes a sliding key cover, making it an attractive addition to any living space. The Donner DDP-90 Pro is designed to be compact and lightweight, ideal for smaller environments. While both instruments are visually appealing, the Casio’s elegant design may resonate more with users looking for a sophisticated look.
Learning Tools
When it comes to learning tools, the Casio Privia PX-870 excels with its duet mode and access to a 2-track MIDI recorder, making it easier for students to learn and practice effectively. This is complemented by its 60 built-in songs and concert play feature. Conversely, the Donner DDP-90 Pro is tailored for beginners with its extensive song library and modern connectivity options, allowing for music app usage and recording. For serious learners, the Casio's advanced features may provide a better learning experience.
Portability
The Donner DDP-90 Pro is designed for portability, being smaller and lighter than many digital pianos without compromising sound quality. This makes it a suitable choice for musicians who need to move their instrument frequently. The Casio Privia PX-870, while not designed with portability as a primary focus, still provides a substantial sound system that may be worth the trade-off for those who prioritize performance over mobility.
Which should you buy?
Choosing between the Casio Privia PX-870 and the Donner DDP-90 Pro ultimately depends on your needs and budget. The Casio, at $999.00, offers superior sound quality, advanced features, and a more authentic playing experience, making it a worthwhile investment for serious musicians. Meanwhile, the Donner DDP-90 Pro, priced at $499.99, appeals to beginners seeking a more affordable and portable option without sacrificing essential features. If you're a beginner or casual player, the Donner may serve you well, but if you're aiming for a more professional setup, the Casio is the way to go.

