Gen2 controllers: advantages of 1 phase current sensor??

[casainho]

Anyone knows potential advantages of adding 1 phase current sensor when the controller already have 1 motor total current sensor??

I am talking about Gen2 cheap chinese controllers. Gen1 just have 1 motor total current sensor (shunt, like the KU63 -- schematic here) while Gen2 have the same 1 motor total current sensor shunt + 1 phase current sensor (hall sensor, like BMSBattery S series/ Kunteng - schematic here.
Gen2 controllers should be more expensive to produce due to the added phase current sensor... so there should be reasons to have a more expensive controllers...

I am developing the OpenSource firmware for BMSBattery S series / Kunteng motor controllers and I would like to know the best way to take advantage of the current sensors...