lexa695,
The Panasonic and Fujitsu use the same glass, so being feed native resolution they do look very similar. That's were it ends, the Panasonic has a horrible scaler built in compared to the Fujitsu. You'll see more trash (artifacting) in the picture watching a Panasonic vs. Fujitsu when it's not the native resolution.
Also, the Fujitsu supports full discrete codes for itself (both IR & RS-232) making it easy to control in a complex or even simple system design.
Last but not least, quality. The Fujitsu has a 3 year warranty out-of-the-box, and I have never had a customer that has had to use it. Panasonic, good luck.... piece of s***!