Join Date: Aug 2019
Location: Warwickshire, UK
Yes there's a difference. The 'neutral' setting is an electronic simulation of 'neutral' in a conventional car. In practice the motor, gearbox and battery are permanently connected (assuming contactors are closed - as they should be with "ignition" on).
If the vehicle is coasting in neutral, the system is directing charge around the HV network to simulate zero or near-zero load on the wheels. It's doing this in conjunction with the cooling system to ensure no part of the HV system overheats.
If the vehicle is towed on all four wheels, the cooling system is inactive, and charge builds in a switching unit (I forget its name, something like the Six Switch). This charge has nowhere to go as the motor generates a potential difference and the reason towing on four (or two) wheels is not recommended is because of the risk of arcing at/around this switch and consequent "thermal event" risk.