When comparing Eye of Gnome (eog) vs qimgv, the Slant community recommends qimgv for most people. In the question“What are the best FOSS image viewers for UNIX-like systems?” qimgv is ranked 1st while Eye of Gnome (eog) is ranked 9th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro More lightweight than other kde or gnome dependent applications like gwenview, gthumb or kphotoalbum
Pro Double-click to view Fullscreen
By default, double-clicking on the current image opens it in Fullscreen mode. This can be turned off in Preferences if desired
Pro Image Slideshow
You can view a slideshow of all images in the current folder, and adjust the delay between images in the Preferences dialog
Pro ESC key exits Fullscreen and program
Pressing the ESC key exits Fullscreen mode, as well as exits the program ... hence press the ESC key twice and you're out
Pro Can set image as wallpaper
You can set the current image as your desktop wallpaper directly from within this program
Pro Simple UI
Pro Fast and lightweight
Pro Can support video playback
Experimental feature via libmpv.
Pro Customizable shortcuts
Can use a variety of short-cuts which can be customized.
Pro Beautiful
Pro Open-Source/Libre
Pro Supports Linux and Windows
Pro Ability to run shell scripts
Pro Plugin support
Can extend/add features by downloading or writing your own plugins.
Cons
Con No APNG support
And it won't be it seems https://bugzilla.gnome.org/show_bug.cgi?id=151281