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).
Sony DSLR-A200 vs. Olympus E420
Sony DSLR-A200: Minolta 50 mm F1.4 lens, Aperture Priority, ISO 100
JPEG Large/Fine, Manual WB, Default Parameters (Standard), Self-Timer
Olympus E420: Olympus 50 mm F2 lens, Aperture Priority, ISO 100
JPEG Large/SHQ, Manual WB, Default Parameters (Normal), Self-Timer
Sony DSLR A200
3,049 KB JPEG (3872 x 2592)
6,102 KB JPEG (3648 x 2736)
Despite both cameras carrying a ten megapixel label the E-420's 4:3 aspect ratio affords it an extra 144 pixels vertically (and our scene as well as resolution chart shots are framed vertically). Because of this the E-420's crops are slightly larger (more magnified) but don't show any more detail than the A200 crops. At a pixel level the Sony's output is visibly sharper. Both cameras handle highlights quite well, delivering a fairly soft 'roll-off' to the highlights on the paperclip crop.