The S (Type 006) has a CCD sensor type which is better than most digital cameras that came out around the same time as it. Most comparable spec digital cameras that were launched around the same time as it have a MOS sensor type. CCD sensors produce high quality, low-noise images but consume a lot more power than CMOS sensors. CCD is the most common image sensor type used in digital cameras.
A CCD sensor type is actually the best sensor type amongst all cameras of this age and type.
A MOS sensor type is the worst sensor type across comparable types of camera.