What are the main differences between the Audi A4 and A6 models?

I'm considering purchasing an Audi but I'm unsure whether the A4 or A6 model would be a better fit for me. Can someone provide a brief comparison of the two?

The main differences between the Audi A4 and A6 are size, performance, and price. The A4 is a smaller, sportier option with a more affordable price point, while the A6 offers more space and luxury features at a higher cost.

One key difference is the engine options available in each model. The A4 offers four-cylinder engines while the A6 has six-cylinder options for more power and performance.