ok went down to have hands-on one the 2 cameras.. here's the review:
-S5 is a lot heavier than the FZ18 and somehow i felt my right index finger more comfortable on the shoot button then the FZ18's.
-There are many many many more buttons and knobs and switches on the S5 than on FZ18 which mainly use a joystick to control.
-There's firmer grip on the FZ18 as it has rubber grip while S5 is more of plastic.
From today's hand-on the 2 cameras, I prefer the S5 but I can't seem to let go the wider and longer zoom from the FZ18 and 16:9 aspect ratio recording. Think the IQ from FZ18 is also better than S5's..
So I think today's hands-on not quite useful also haha