Ubuntu vs Debian
Debian is the older project and Ubuntu is the larger derivative: Ubuntu 26.10 builds on Debian's package format, ships GNOME 51 with kernel 7.3 and asks for 6 GB of memory, while Debian 13.6 carries GNOME 48 with kernel 6.12 and runs in 2 GB. The question is which release model suits you.
Side by side
| Ubuntu | Debian GNU/Linux | |
|---|---|---|
| Family | deb | deb |
| Release model | Versioned releases | Versioned releases |
| Desktop | GNOME | GNOME |
| Package manager | APT (dpkg) | APT (dpkg) |
| Init system | systemd | systemd |
| Immutable root | No | No |
| Wayland by default | Yes | Yes |
| Minimum RAM | 6 GB | 2 GB |
| ISO size | 6.2 GB | 3.5 GB |
| Latest kernel | 7.3 | 6.12 |
| Releases archived | 56 | 42 |
| Latest release | 15 October 2026 | 12 September 2026 |
What differs
Base & packages
Ubuntu is Debian-based and uses the same DEB format, but its 26.10 snapshot is ahead on toolchain versions: GCC 16.2 and glibc 2.44 against GCC 14.2 and glibc 2.41 in Debian 13.6. Debian ships PostgreSQL 17, PHP 8.4, Python 3.13 and Samba 4.22 from its own archive, while Ubuntu adds Snap channels for Firefox and Thunderbird alongside its APT repositories.
Desktop & display
Both default to GNOME, but two major versions apart: 51 on Ubuntu, 48 on Debian. Ubuntu 26.10 removed the X11 session altogether, so the desktop runs on Wayland only. Debian 13.6 still records an X.Org Server at 21.1.16 next to its Wayland default, which keeps the older session available.
Release model
Ubuntu releases on a fixed calendar, most recently 26.04.1 on 20 July 2026 and 26.10 on 15 October 2026. Debian's newest point release is 13.6 on 9 August 2025 with kernel 6.12, and its 10.7 release from 3 February 2021 still runs on kernel 4.19, which shows how long a Debian line is kept in service.
Hardware requirements
Debian states 2 GB of RAM against Ubuntu's 6 GB, and a 3,628 MB image against 6,309 MB. Debian's floor has stayed low because its default installation carries less than Ubuntu's desktop image.
Init & immutability
systemd on both, at 261 for Ubuntu 26.10 and 257 for Debian 13.6, with neither marked immutable. Debian's installer offers more choices during setup, but the resulting system is the same shape: a writable root with GRUB in charge of boot.
Verdict
Choose Ubuntu if you want the newest GNOME and kernel in a fixed-release desktop, are willing to give it 6 GB of memory, and want the larger commercial ecosystem around a distribution. Choose Debian if you want packages built by the project itself, a 2 GB memory floor, and a line that stays supported for years after its first release. Both use APT, so moving between them is mostly a question of which archive you trust.
FAQ
Is Debian more stable than Ubuntu?
The recorded versions point that way: Debian 13.6 ships GCC 14.2 and glibc 2.41 while Ubuntu 26.10 ships GCC 16.2 and glibc 2.44. Stability also comes from release policy, which the dataset records as versioned for both, with point releases in between.
Can I run the same programs on both?
Yes, since both use DEB packages and APT. Version differences matter more than availability: Ubuntu carries GNOME 51, Debian 13.6 carries GNOME 48.