What is the key difference between the Audi A4 and A4 Allroad?

I've been trying to decide between the Audi A4 and the A4 Allroad. Both models seem similar, but what sets them apart?

The main difference between the Audi A4 and the A4 Allroad is the drivetrain. The A4 has a traditional front-wheel drive setup, while the A4 Allroad has Audi's signature quattro all-wheel drive system. This provides better traction and handling, especially in inclement weather or rough terrain.