To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the S7. But it costs extra on the Panamera.
Both the S7 and the Panamera have standard driver and passenger frontal airbags, front and rear side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, post-collision automatic braking systems, daytime running lights, lane departure warning systems, rearview cameras, driver alert monitors, available night vision systems, blind spot warning systems, around view monitors and rear cross-path warning.

