Sensorless gives more raw power and uses feedback from the motor windings to give feedback but can have a small cogging issue on initial take-off, sensored will work better at low RPM but is suppose to produce a little less power.
I should have my R1 next week, with motor, it will run both sensorless and sensored motors, it can be hooked up to a PC for firmware updates, plus up and download setups, is lipo enabled and very very small.
someone poke me on tuesday when my parcel arrives, if it is what I think it is, then I will take some pics.
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