saw a tesla model s sedan today

Who do you think designed the model s? Fisker auto did. The karma and model s are the exact same car with different frontends.

The Fisker is a hybrid. The Tesla is pure electric and is an original design. They have no components in common.

I have driven a Model S and it is actually pretty badass. It pulls like a locomotive at any speed, and never has to shift gears. Great ride, and zero body roll on corners due to the low CG.

Yes, three have made the news with fires lately, but two of them ran over large metal objects on the freeway, and the other guy crashed into a stationary object at 45mph. All three drivers walked away. As Elon Musk said, "There is a reason why most people who try to set something on fire start with gasoline, rather than batteries".