Today, which one you might choose has more to do with how you vibe with either one. So there is no “wrong” choice. But back in the early days, Gnome was the better DE. More polished and definitely more stable. I can remember the crashes and the total crash and burn of KDE from those days. That gave Gnome the leg up to becoming default for many distros.

These days. KDE Plasma is every bit as good as Gnome.