Murky marketing strikes again. Of course, only the newer “ANT” model has the progress display.
VC2 has a display, but not as much of a no-brainer; not everyone thinks in terms of volts and amps. And worst of all, it become useless if that special input cable is lost, and is much harder to replace than a typical micro-USB cable.
Polarity is at least something anyone who has ever used a battery-power device has encountered, so it’s not an entirely foreign concept.