Use Ohms law; U=R*I, that is, voltage=resistance*amps.
The original quantum comp: 0,00045 * 20 amps = 0,009 volt.
The other way around: The new quantum: 0,013 / 20amps = 0,00065 ohms.
Maybe we've found the reason for LRP to change their way of spec'ing an ESC
Personal I find we're talking about minor marginals, but it might of course depend on the level of competition. But it's nice to see that my 7.1 still can compete: 0,00052 ohms.
