Both are good, both look good, both have their advantages and disadvantages.

- If you like to customize your desktop environment, then KDE is better.
- KDE is lighter on system resource utilisation.
- KDE has a larger suite of native applications.
- Both KDE and GNOME have extensions, however KDE extensions seem to be more stable from one version to another.
- If you want something that just works, you don't care much about customisation the GNOME is for you.
- GNOME is more popular, more distros ship with GNOME then KDE. If you want to swap distros often, and feel familiar with each, then GNOME is better.
- GNOME has better accessibility options for people with disabilities.

Ultimately the choice is yours.
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