When comparing Razer Mamba vs Steelseries Sensei, the Slant community recommends Steelseries Sensei for most people. In the question“What is the best gaming mouse?” Steelseries Sensei is ranked 24th while Razer Mamba is ranked 31st. The most important reason people chose Steelseries Sensei is:
There are many settings including acceleration, polling rate, and others that can be changed from software or the built-in LCD. You can customize the 7 buttons to do whatever you like.
Specs
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Pros

Pro Good design, good software
Very comfortable, good weight and easy-to-program options (button functions, colors, etc).
Pro Has wireless and wired options
The Razer Mamba is a wireless mouse that is also able to be wired by simply plugging in the provided USB cable.
Pro Customizable
There are many settings including acceleration, polling rate, and others that can be changed from software or the built-in LCD. You can customize the 7 buttons to do whatever you like.
Pro CPI switching
You can change between 2 different DPI settings via a convenient button located below the scroll wheel.
Pro Ambidextrous
Both right-handed and left-handed people can use the mouse.
Cons

Con Battery life is very limited
Battery charge dies very quickly.
Con Bad driver software
The driver software is buggy and crashes often.
Con Somewhat poor grip
The material the mouse is made up of can be slick especially when using with sweaty hands, something that often happens with prolonged use.
