We have a Focus Electric and a Fusion Energi.
Carrying around a 23kWh battery in the Electric vs. carrying around an ICE with a 7kWh battery in the Energi is pretty much a wash as far as energy consumption is concerned. The Energi is only 289 pounds heavier than the Electric. I look at Watt-hours per mile consumed in both of our cars and they are pretty even. The most economical single all electric trip so far has been in the Energi.
Trunk space is limited in both cars but in different ways. I think that you could fit four backpacks in the Energi if you play Tetris with them. I don't think that you could get four in the Electric without removing the organizer and the cargo cover. The good news, however, is that if you're going to take the organizer out and leave it behind, it's just as easy to take out the cargo cover at the same time. Then you have a little more cargo room than the Energi with things able to stick up above the back seats. You can do that if you need to.
There is plenty of room for a week's groceries in the trunk of either car.
When I first went car shopping, the first thing I did was ask to see the trunks of a regular ICE Fusion, Fusion Hybrid, and Fusion Energi. Based on that first impression, I dismissed the Energi out of hand. After further consideration, thinking of how infrequently we would use the car for trips vs daily driving, we decided to go with the Energi rather than the hybrid. In my experience, the Energi will fit two carry-ons, a large suitcase, a duffel bag, one or two toiletry bags, and a hanging bag. That's more than enough for my wife and me. Packing for two adults and two children in either car is going to take some thought.
15 miles/day is very easily within the Energi's range. You could drive the car most days entirely on electricity as I do. The ability of the car to drive as a normal hybrid would allow you to use it for long out-of-town trips. Some of the trim on the Energi is nicer than on the Electric - Homelink, memory seats and mirrors, self-dimming mirrors, more electric seat adjustments for both driver and passenger, etc., but it is a considerably more expensive car. With a gas engine, maintenance for the Energi will also be more expensive.
I love both cars. Our main reason for buying the Energi was to be able to drive mostly on electricity around town and have the option to take the car on long trips. Our main reason for getting the Electric was the economics of operating and maintaining an all-electric commuter car.
Handling in the Electric is more sporty. The ride in the Energi is smoother and quieter.
My biggest disappointment with the Electric is no Homelink, but it's not a big deal to clip a garage door remote to the visor. The dealer quoted me a price of $250 to upgrade to a Homelink visor, which I am considering.
My biggest disappointment with the Energi is the audio system in the SE model we purchased. The Sony audio system in the Electric is nicer than in the Energi SE while the Sony system in the Energi Titanium is another step up from the Electric's.
If I were doing anything differently in purchasing cars today, it would be to order a Fusion Energi Titanium with either the red or the ceramic seats and a few more options mostly so that I could get the Sony audio system.
Hope this helps.
2014 Ford Focus Electric - Oxford White
2013 Ford Fusion Energi SE - White Platinum Metallic Tri-coat
2012 Ford Fusion Hybrid - Tuxedo Black Metallic
2005 Ford F-150 Lariat - Arizona Beige Metallic
East Cobb County, Georgia