Compared to... Canon SD500 (Ixus 700)

Below you will find a studio comparison between the Casio EX-Z750 and the similarly specified Canon PowerShot SD500 at ISO 400.

Studio scene comparison (@ ISO 400)

• Sony DSC-P200 : Manual exposure mode, ISO 400, Default Image Parameters,
  Manual white balance
  
• Canon PowerShot SD500: Program mode, ISO 400, Default Image Parameters,
  Manual white balance, +1.0 EV compensation
   
• Lighting: Daylight simulation, >98% CRI

Sony DSC-P200	Canon PowerShot SD500
ISO 400, 1/400 sec, F4	ISO 400, 1/636 sec, F4
3,197 KB JPEG	3,332 KB JPEG
Noise, std dev: 4.1	Noise, std dev: 3.9

At ISO 400 there's still very little between these cameras; the Canon has slightly lower luminance noise (and considerably less color noise), but seems softer overall (thanks in part to stronger noise reduction, in part to higher in-camera sharpening on the Sony). What is perhaps most surprising is how well both cameras control noise, which is actually lower than many equivalent 5 megapixel models at the same ISO setting.