Costa, the only differences you will find in the images are the flexibility offered in plugins (some may show up in the plugins section available for download and some that will work only with certain images), skins, gui layout, etc. Your choice, best to try them one at a time until you find the one you like.

You might check for a multiboot option (don't know if it's available for the Zero. Usually embedded into the image or available as a plugin. This will allow you to keep x number of images on your hard drive or usb stick that you can select from a menu to boot up and not have to flash every time you decide to change an image. Very nice option for testing purposes.