sony is an exception to the rule, the SLT robs the camera of light, hence the low scores.
Charlie, that's exactly my point if we take that one step further.
Lower scores in almost all measurement categories, still, the overall score is 7 higher than the 6D. Why? Because DXO apparently generates their final scores mostly based on how the sensor performs at base ISO, which is arguably only a small percentage of what everybody shoots with their FF cameras in real life. I probably shoot ISO 100-200 5% of the time max.
So if you're a landscape or real estate photographer for example, or someone shooting in the studio at ISO 100-200 DXO is more valid to you. To me as an event, wedding, and fact action bird photographer, I'd be worse off using the higher score A99 than using a 6D or 5DIII.