Canon 5D Mark III vs Sony A99 High ISO JPEG Image Comparison test done by a popular Japanese website dslrmagazine, the JPEG noise reduction turned off on both sides, see the results below
Canon 5D Mark III JPEG Images have less noise compared to Sony A99 at ISO 6400, so with Canon you get better High ISO Images. Canon 5D Mark III available at $3299 and Sony A99 available at $2798.
Source & Image credit – dslrmagazine