It's not about the Size of the wire its how you use it...... Or is it?

[_paralyzed_]

sensors allow the esc to sense the motors rotor position, and can deliver power accordingly to reduce cogging. Cogging use to be a major problem but todays software revisions have pretty much eliminated cogging.

Some people will swear to you sensored systems are smoother. These are usually racers who know their cars so well they can feel if a fly landed on it from the drivers stand.

There aren't situations where you would use sensored or sensorless. If your motor and esc support sensors you use them. If one or both don't support sensors you don't use them.

edit: also- more wire=more resistance