Roy Kaylor was selling practical EV conversion kits for VW platforms over twenty years ago, for a fraction of current prices.
His range was better than the Volt, his hybrid version was about the same as the “Leaf”!
Still a fraction of the cost.
The newer cars have made very little progress as compared to Roy’s products.
Neither their range or charging rate are significantly better.
The ONLY thing they have is factory production, luxury features, and subsidies.
Neither of your links is ready for prime time today, allowing for hype and real world development time, I will stick by my ten to twenty year prediction for practical capacitor development.
http://www.kaylor-kit.4t.com/about.html
http://www.youtube.com/watch?v=ZXkijd6_ECQ