Brushless experts please read

[kufman]

Statement #6

Losses are the current squared times the resistance. So... reducing the current draw by a factor of two lets say, reduces resistive losses by a factor of 4! So what you have said in #6 is true, the higher voltage system will run more efficiently.

Statement #5

Torque is proportional to the amp-turns of the motor. so what you have said in #5 isn't always true. a 10 turn motor running 5A will have similiar torque to a 5 turn motor running 10A.

#4 sounds correct.

#3 I think is correct.

#2 Is correct.

#1 I believe to be correct.