To address the question of whether Debian (with Dolphin) or Ubuntu is better, we need to clarify a key point: Dolphin is not a standalone operating system but a file manager (the default for KDE Plasma). If you’re using Debian with Dolphin (by installing the KDE desktop), the comparison shifts to Debian (KDE) vs. Ubuntu (GNOME). Below is a detailed breakdown of their differences and suitability for different users.
1. Core Experience & Desktop Environment
- Ubuntu: Uses the GNOME desktop environment by default, known for its simplicity, minimalism, and modern design. It’s optimized for touchscreens and integrates well with Ubuntu’s ecosystem (e.g., Ubuntu Software Center).
 
- Debian (with Dolphin): Uses the KDE Plasma desktop (if you install the 
kde-plasma-desktop package). KDE is highly customizable, feature-rich, and caters to users who prefer a traditional desktop experience with advanced tools (like Dolphin’s powerful file management features). 
Which is better?
- Choose Ubuntu if you want a streamlined, out-of-the-box experience with minimal setup.
 
- Choose Debian + KDE if you value customization and need a more traditional desktop layout.
 
2. Stability vs. Freshness
- Debian: Prioritizes stability above all else. Its stable branch uses older, thoroughly tested software to ensure reliability—ideal for servers and long-term deployments. Even the testing/unstable branches are more conservative than Ubuntu’s updates.
 
- Ubuntu: Balances stability with freshness. Regular releases (every 6 months) include newer software versions, and LTS (Long-Term Support) versions (every 2 years) offer 5 years of security updates. This makes Ubuntu more suitable for users who want newer features without sacrificing too much stability.
 
Which is better?
- Choose Debian if you run a server or need a rock-solid desktop for critical tasks.
 
- Choose Ubuntu if you want newer software (e.g., latest GNOME updates, web browsers) and don’t mind occasional updates.
 
3. Software Availability & Management
- Ubuntu: Has a larger repository of pre-built packages and supports PPAs (Personal Package Archives), which let you install newer versions of software (e.g., Chrome, Spotify) easily. The Ubuntu Software Center provides a user-friendly way to browse and install apps.
 
- Debian (KDE): Relies on the Debian repositories, which contain only free software by default (though non-free repos can be enabled). While Dolphin and KDE apps are available, newer versions may lag behind Ubuntu’s. However, you can add PPAs or third-party repos for newer software.
 
Which is better?
- Choose Ubuntu if you need easy access to the latest proprietary/commercial software or frequent updates.
 
- Choose Debian if you prefer free software and don’t mind waiting for newer versions.
 
4. Performance & Resource Usage
- Ubuntu: The GNOME desktop can be resource-intensive, requiring more RAM and CPU (especially with visual effects enabled). This makes it less ideal for older hardware.
 
- Debian (KDE): KDE Plasma is also resource-heavy, but Debian’s minimal base installation (without GNOME) allows for a lighter setup. You can optimize KDE to use fewer resources (e.g., disable animations, use a lightweight theme).
 
Which is better?
- Choose Ubuntu if you have modern hardware and want a polished, albeit heavier, experience.
 
- Choose Debian + KDE if you’re on older hardware and want to tweak performance.
 
5. Community & Support
- Ubuntu: Boasts a massive, beginner-friendly community. Its documentation, forums, and Ask Ubuntu are among the best resources for troubleshooting. Canonical (Ubuntu’s company) also offers paid support for enterprises.
 
- Debian: Has a smaller but highly knowledgeable community. Support is mostly community-driven (forums, mailing lists), though some commercial support is available via third parties.
 
Which is better?
- Choose Ubuntu if you’re a beginner or need easy access to help.
 
- Choose Debian if you’re comfortable troubleshooting on your own or have specific needs that require a community-focused distro.
 
6. Use Cases
- Ubuntu: Best for:
- Beginners transitioning from Windows/Mac.
 
- Desktop users who want a hassle-free experience.
 
- Developers who need a stable, well-supported environment.
 
- Servers (via Ubuntu Server, an LTS version optimized for servers).
 
 
- Debian (KDE): Best for:
- Advanced users who want full control over their system.
 
- Servers requiring maximum stability.
 
- Users who prefer KDE’s customization and feature set.
 
 
Which is better?
- Choose Ubuntu if you’re new to Linux or need a balance of ease and functionality.
 
- Choose Debian + KDE if you’re experienced and want a tailored, stable desktop.
 
Final Recommendation
- For most users: Ubuntu is the better choice due to its user-friendliness, extensive software library, and strong community support.
 
- For advanced users: Debian (with KDE) offers more control, stability, and customization—ideal if you’re comfortable managing your system or need a server-grade setup.
 
If you specifically want Dolphin as your file manager, Debian (with KDE) is the way to go, but be prepared for a more hands-on experience compared to Ubuntu’s out-of-the-box convenience.