Razer Deathadder is an all round good mice, It doesn't excel at anything but it doesn't have any problems. It has a good optical sensor and easy to use software.
Logitech G502 is the best performing mice here with its over the top 12000 dpi optical sensor, currently the best on the market. I don't have extremely large sized hands so i can palm this mice perfectly fine and to me, it feels very comfortable, better than the razer or steelseries. Slightly smaller mice than the razer. Downside is, it is heavy and you can definitely feel the weight of the mouse. So if u want quick responsive accurate long gaming sessions, this might not be the one, but if you are fine with a heavier mouse as some people do prefer heavier mouse, and you want the best sensor on the market, g502 is the one. Logitech has an easy software to use and its customer service is pretty decent too as the mouse comes with 3 year warranty/
I'd stay away from steelseries as these other 2 mice are much better.