This is our standard studio scene comparison shot taken from exactly the same tripod position. Lighting: daylight simulation, >98% CRI. Crops are 100%. Ambient temperature was approximately 22°C (~72°F).
Olympus E-620 vs. Panasonic DMC-G1
Olympus E-620: Olympus 50 mm F2 Macro lens, Aperture Priority, ISO 100
JPEG Large/SuperFine, Manual WB, Default Parameters (Standard), Self-Timer
Panasonic DMC-G1: Olympus 50 mm F2 Macro lens, Aperture Priority, ISO 100
JPEG Large/Fine, Manual WB, Default Parameters, Self-Timer
7.1 MB JPEG (4032 x 3024)
3.5 MB JPEG (3872 x 2592)
There's slightly greater detail in the Panasonic crops but there are also rather more jagged edges on the edge of the paperclips in its output (There's also a hint of color moiré in the horizontal lines on the medals in the third crop). The color rendition is very similar between the two cameras, though the Olympus is making more of a distinction of tones in the pastoral scene.