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-A350: EF 50 mm F1.4 lens, Aperture Priority, ISO 100
JPEG Large/Fine, Manual WB, Default Parameters (Standard), Self-Timer (with MLU)
Olympus E-520
Sony DSLR-A350
5.9 MB (3648 x 2736)
4.0 MB JPEG (4592 x 3056)
Again, there's not a lot to call between the 14 megapixel A350 and the Olympus 10 megapixel offering. The Sony images are a touch softer but not to the extent that you'd notice, were they not placed side-by-side. There's essentially no difference in terms of the amount of detail being conveyed in the JPEGs, irrespective of pixel counts.