Difference between Kali Linux 2.0 mini and Light
The mini ISO only provides the minimum necessary to boot Kali and allow installation over the Internet; that's why it's so small. The normal ISO provides the full Kali 2.0 setup using GNOME 3, which now requires 768MB of memory. The light ISO provides a Kali 2.0 setup using XFCE, and a smaller selection of tools (Iceweasel, OpenSSH, NMap, NCrack, SQLMap and AirCrack-NG; see
variant-light/package-lists/kali.list.chrootin the live build configuration for details).