When comparing XGnome Enhanced vs Zukitwo, the Slant community recommends XGnome Enhanced for most people. In the question“What are the best Gnome Shell themes?” XGnome Enhanced is ranked 5th while Zukitwo is ranked 6th. The most important reason people chose XGnome Enhanced is:
XGnome Enhanced supports Gnome Shell versions going all the way back to Gnome Shell 3.6.
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Pros
Pro Supports many versions of Gnome Shell
XGnome Enhanced supports Gnome Shell versions going all the way back to Gnome Shell 3.6.
Pro Offers PPA for easy install on Ubuntu
There is an optional PPA for easy install on Ubuntu.
sudo add-apt-repository ppa:noobslab/themes && sudo apt-get update && sudo apt-get install xgnome-enhanced-gs
Pro Designed to be modern and minimal
The XGnome Enhanced theme is deigned to be modern and minimal. It is a very dark theme with clean lines.
Pro Built in matching GTK theme
Zukitwo theme offers a matching GTK theme to the built in Gnome Shell theme.
Pro Offers PPA for easy install on Ubuntu based distros
Zukitwo offers an Ubuntu PPA for Ubuntu based distros.
sudo add-apt-repository ppa:noobslab/themes
sudo apt-get update
sudo apt-get install zukitwo
Cons
Con PPA does not work
For example, you'd get errors like "Unable to locate package xgnome-enhanced-gs."
Con Only supports latest version of Gnome Shell and GTK
Zukitwo only officially supports the latest release of Gnome Shell and GTK.