All things being equal, generating heat is a more energy intensive than cooling, which simply involves moving heat out of the air you want "cooled."
Although the heater in the FFE does have an electric compressor, it is not an electric resistance heater. The descriptions are vague but sounds like some kind of heat pump to me.
http://media.ford.com/images/10031/Ford ... ehicle.pdf
One of the things that reduces range in the cold, is not just generating heat for the cabin, but the battery itself is less effective if it is cold. Thus, preconditiong will be key, and one of the things to remember about preconditioning is that the battery has considerable thermal mass, so once you get it warm it will stay warm for a long time, and of course while in use it is generating heat.
The Nissan LEAF initially had nothing to heat the battery. And the range suffered accordingly. Nissan subsequently added resistive heating strips, but unlike the FFE Nissan does not use liquid cooling/heating so one wonders how effective that heat is distributed throughout the battery.
What region are you in?
Range will be reduced in Winter but certainly the FFE will perform better than the LEAF. If you can keep the car in a garage and if you can precondition the affects will be much smaller. I would guess we are talking 10 to 30 percent range reduction, but figuring out where you will be is dependent on many factors.
Given your 40 mile commute and 50 if you run errands, I do not think winter range will be an issue for you at all.