When comparing XGnome Enhanced vs Elegance Colors, 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 Elegance Colors is ranked 11th. 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 PPA for Ubuntu
There is a PPA available for Ubuntu users, which makes installing a breeze.
sudo add-apt-repository ppa:satyajit-happy/themes
sudo apt-get update && sudo apt-get install gnome-shell-theme-elegance-colors
Pro Changes color
Elegance Colors can change it's Gnome Shell theme colors in accordance to the users GTK them, wallpaper or a user defined color.
Cons
Con PPA does not work
For example, you'd get errors like "Unable to locate package xgnome-enhanced-gs."
Con Outdated
The theme project has been abandoned and there has been no activity for the past two years (the last commit was in May 2015).
Con More involved to set up than other themes
Users need to run a command to run a process in the background for the theme to work correctly, which may be more involved than what users are typically looking for in a theme.
Con Doesn't work
Doesn't install and doesn't work.