The Mini-C [Mini-Change] connector is used on thick backbones [heavy cable].
The Micro-C [Micro-Change] connector is used on thin backbones [light cable].
Each cable uses different wire gauges for the different signal lines.
The power lines are 22AWG for the light version and 16AWG for the heavy version.
The signal lines are 24AWG for the light version and 18AWG for the heavy version.
The maximum current is also defined as 3 amps for the light version and 8 amps for the heavy version.
The current difference indicates why one user might prefer a thick backbone over a thin one.
