When comparing Moka vs clearlooks-phenix, the Slant community recommends clearlooks-phenix for most people. In the question“What are the best gtk3 themes?” clearlooks-phenix is ranked 11th while Moka is ranked 15th. The most important reason people chose clearlooks-phenix is:
This theme has a good text and border contrast.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Several distro specific instruction to download
Moka offers suers easy to follow instructions to download including PPA's for Ubuntu based distros and Fedora specific instructions to install its repo.
Pro Wide support
Besides this Gnome Shell theme there are multiple GTK and icon themes that match, giving the user a wide variety of themes to mix and match that still look great together.
Pro Good contrast
This theme has a good text and border contrast.
Pro Available everywhere
Clearlooks was basically ported to almost every OS or device so you can even make your virtual guest OS look like your host OS.
Cons
Con Does not work on older version of Gnome Shell
Moka does not work on Ubuntu 12.04 nor will it work on Debian Wheezy as they both use old version of Gnome Shell.