Compared to...

Studio scene comparison (JPEG)

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).

Fujifilm S5 Pro (12MP) vs Canon EOS 30D

Camera settings:

• Fujifilm S5 Pro: Nikkor 50 mm F1.4 lens, Aperture Priority, ISO 100
  JPEG Large/Fine, Manual WB, Default Parameters (Normal), Self-Timer
   
• Canon EOS 30D: Canon EF 50 mm F1.4 lens, Aperture Priority, ISO 100
  JPEG Large/Fine, Manual WB, Default Parameters (Standard PS), Self-Timer

Fujifilm S5 Pro (12MP)	Canon EOS 30D
5,819 KB JPEG (4256 x 2848)	2,847 KB JPEG (3504 x 2336)

The 30D's superior 'per pixel' sharpness produces an image that looks a lot nicer than the S5 Pro, though the actual amount of detail being captured is roughly the same.

Fujifilm S5 Pro (6MP) vs Canon EOS 30D

Camera settings:

• Fujifilm S5 Pro: Nikkor 50 mm F1.4 lens, Aperture Priority, ISO 100
  JPEG Medium/Fine, Manual WB, Default Parameters (Normal), Self-Timer
   
• Canon EOS 30D: Canon EF 50 mm F1.4 lens, Aperture Priority, ISO 100
  JPEG Large/Fine, Manual WB, Default Parameters (Standard PS), Self-Timer

Fujifilm S5 Pro (6MP)	Canon EOS 30D
3,727 KB JPEG (3024 x 2016)	2,847 KB JPEG (3504 x 2336)

It's pretty much the same story if you shoot at 6MP; the 30D has better per pixel sharpness. If you turn up the in-camera sharpening (or apply some unsharp masking later) on the S5 Pro shot it's possible to reduce the difference between these two shots significantly, but not totally.