If you don't understand Dutch, then you'll have to turn on YouTube's caption translation feature.
In this video, AutoWeek Netherlands compares the BMW i3 REx to the Audi A3 e-tron.
Which vehicle comes out on top? Well, it depends on your needs/tastes/budget, etc.
Though titled "Versus," this video focuses more on presenting the attributes of each vehicle, rather than pitting them against one another.