What's the trim on the e-Golf? If it's an SE you'll be missing out on cruise control (and some other features). The SEL adds cruise, leather, LED headlights, heat pump, and some other stuff that's not coming to mind. Personally I wouldn't pay that much for an SE, but I'd consider it for the SEL. Focus just had the one trim so that's simpler.
2016 e-Golf pros: maybe fast charging (CCS standard on SEL/optional on SE), longer EPA range (in 2016 it was about 85mi vs about 75mi for the Focus), newer means probably less battery degradation, full cargo availability (didn't give up any room for battery like the Ford did), and personal likes for me are Android Auto/Apple Carplay and the analog gauges.
2012 FFE pros: cheaper, remote start on the key fob, liquid cooled battery (should hold up better in hot weather)
But in the downside the focus is much older and either already out of the 8yr battery warranty or will be very soon.
Personally, I'm considering between a 2017 Focus Electric and a 2016 e-Golf SEL both listed at $16000. That's a much closer comparison in my opinion. For 2017+ the Focus got a bigger battery rated over 100mi range, Android/Apple Carplay, and standard CCS fast charge port. The e-Golf still has the heat pump advantage so it loses less range to the heater in winter, and a much bigger cargo area. I'll go with whichever seller is willing to come down more on price.