The Olympus FE-4020 has a better sensor type than most similar spec digital cameras that were launched around the same time as it. This Olympus camera has a CCD sensor type, whereas most bridge camera digital cameras that are a comparable age to 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 bridge camera digital cameras that have been around for more than two years.
The worst sensor type amongst similar types of camera is MOS.