The 160Rxi is not a brushless starter, only pump.
There is no 220Pro. But the 220 started the Brushless pump/starter series.
The 220Rxi not only has a brushless starter..but it’s a brushless generator too, so you never have to charge the ECU pack! It charges the ECU battery back to 96% (to avoid balancing issues) I flew one model 3 years and never touched the ECU battery.