The canon G16 have a 1/1.7″ CMOS Sensor and Fujifilm X20 features 12MP 2/3″ X-Trans CMOS II Sensor , the most important thing about the fujifilm X-Trans sensors are they don’t use low-pass filter, hence you get a ultra sharp images with less noise .
Canon Power Shot G16 vs. Fujifilm X20 Specification Comparison Table.
Bigger Sensor Size: Fujifilm X20 have bit bigger sensor than Canon Power Shot G16.
Fujifilm X20 features bigger sensor size than Canon Power Shot G16, hence you get better dynamic range, improved High ISO performance and better color and contrast reproduction with Canon Power Shot G16.
Optical Zoom: Canon Power Shot G16 has 1x more optical Zoom than Fujifilm X20.
Aperture Range: Canon Power Shot G16 aperture Range is better than Fujifilm X20, the bright aperture lenses capture more incoming light to the sensor, create more DOF, better color and contrast reproduction and it also create less noise during low-light situation.
Better AF System: Fujifilm X20 features Phase + contrast (hybrid) AF System; on the other hand Canon Power Shot G16 features Contrast AF system.
Better low light performance – The Canon Power Shot G16 features more ISO range compared to Fujifilm X20, the ISO range of Canon Power Shot G16 is upto 80-12800, Fujifilm X20 is limited to 100- 12800 only.
Better Shutter Range: Canon Power Shot G16 features better shutter range compared to Fujifilm X20.
Top Continuous shooting speed: Canon Power Shot G16 features fast shooting speed compared to Fujifilm X20.
Display: Canon Power Shot G16 features bigger and high resolution display compared to Fujifilm X20.
Battery Life (CIPA): Canon Power Shot G16 battery rating is 360 shots and other hand Fujifilm X20 270 shots. According to CIPA.
Dimensions: Canon Power Shot G16 is smaller than Fujifilm X20.
Weight: Fujifilm X20 lighter than Canon Power Shot G16.
Verdict: The fuji offers bigger sensor Size and no-optical low pass filter, hence for sure you will get better image quality than Canon G16. + The fujifilm X20 also have Hybrid AF system (contrast + phase) and Canon G16 is limited to contrast based system only, We highly recommend you to buy Fujifilm X20
Buy Fujifilm X20 from Amazon || Buy Canon G16 from Amazon