What is the difference between Audi A8 Base and Long models?

I'm having trouble deciding between the Audi A8 Base and Long models. What makes them different and which one would you recommend based on their features?

The main difference between the Audi A8 Base and Long models is their wheelbase length. The Long model has a longer wheelbase which provides additional legroom for rear passengers. If you frequently have passengers in the backseat, I would recommend the Long model for added comfort.