When comparing Zowie FK1 vs Steelseries Sensei [RAW], the Slant community recommends Zowie FK1 for most people. In the question“What is the best gaming mouse?” Zowie FK1 is ranked 5th while Steelseries Sensei [RAW] is ranked 6th. The most important reason people chose Zowie FK1 is:
The standard lift off distance on a cloth mouse pad is 1.5-1.8mm though it will be a bit higher when using a plastic pad being 2.2 - 2.4mm. To enable the plastic pad setting a certain button combination has to be pressed on the gaming mouse itself.
Specs
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Pros
Pro A low lift-off-distance of about 1.5-1.8mm
The standard lift off distance on a cloth mouse pad is 1.5-1.8mm though it will be a bit higher when using a plastic pad being 2.2 - 2.4mm. To enable the plastic pad setting a certain button combination has to be pressed on the gaming mouse itself.
Pro Excellent 3200 CPI optical sensor
The Zowie FK1 gaming mouse uses an Avago 3310 optical sensor which is regarded as one of the best in the world. It has no built-in acceleration and no angle snapping. It’s practically jitter-less when set at 125 and 500Hz polling rate, and has barely noticeable jitter at 1000Hz.
The Avago 3310 has no native CPI, it is made to have each step of 50 CPI work as well as the previous one. With CPI steps of 400/800/1600/3200 for the FK1, all CPI choices should work equally well.
Pro Can be used by both righties and lefties
The Zowie FK1 gaming mouse uses an ambidextrous design with a wide base for the palm rest.
Pro Comfortable for most grip types
FK1 has a very universal shape and size, making it a safe choice for most people regardless of grip type and hand size. Except for people with large hands who use the palm grip, who may need a larger model of the mouse.
Pro No unnecessary functionality
Zowie has kept the mouse remarkably simple. There's no RGB lighting, adjustable weights, or superfluous buttons that end up only getting in the way. It's plug-and-play and requires no additional software. You can customize only the essential settings such as lift off distance, polling rate, or switch between left or right-handed modes with just a combination of specific button presses.
Pro Ships with a set of replacement feet
The Zowie gaming mouse has an extra pair of mouse feet in the box so users can replace their old ones when the time comes.
Pro Switches have a bit harder press so you don't accidentally kill your teammates
Pro Ambidextrous
The Steelseries Sensei [RAW] gaming mouse is an ambidextrous mouse that is default set to right handed.
Pro Great for palm and claw grips
Users who prefer palm or claw grips will have no problems using this mouse.
Pro Available with a metal, glossy or rubberized finish
The Steelseries Sensei [RAW] gaming mouse comes in three selectable finishes, metal, glossy or rubberized.
Pro Driver software allows adjusting sensitivity, accent illumination and reprogram buttons
The driver software dashboard allows for numerous customizations such as illumination changes and programmable buttons.
Pro Great gaming mouse buttons
Tactile and light without being easy to press by resting your hand on the gaming mouse.
Pro On-the-fly two-state CPI switch
There is a button below the scroll wheel that allows for on the fly DPI switching.
Pro Braided cable the metal and glossy/rubberized editions
The Steelseries Sense[RAW] gaming mouse comes with a braided anti-tangle cord.
Cons
Con Two of the side buttons are unutilized in normal use
While the mouse has four side buttons, only two of them can be used at a time, depending on which hand you are using it with.
Con A bigger model might be needed for large handed people who prefer a palm grip
Due to its short height and the small hump on top of the mouse, it might not be suitable for people with large hands who prefer using a palm grip.
Con Slight lens rattle
There is some lens rattle when you pick up the device and shake it.

Con Only 4 DPI settings
Even though the ADNS-3310 sensor supports DPI settings in increments of 50, the FK1 only lets you choose between 400 / 800 / 1600 / 3200 DPI.
Con Not quite as comfortable as a non-ambidextrous mouse
Due to its thoroughly ambidextrous design, sometimes the ring and pinky fingers can touch the side buttons. Even though they are deactivated and won’t cause mispresses, they are still not as comfortable as non-ambidextrous designs.
Con DPI switch can't be used on-the-fly
A DPI switch is available, but it's located under the mouse, so it can't be used on-the-fly.
Con Pressing the main buttons may feel tiring after some time
Though it’s usually a matter of preference, the main buttons are a bit harder to press compared to other mice, which some people may find tiring after long periods of use.
Con Cord can break easily
The cheap rubber cord might be prone to breaking easily.
Con Far side buttons can be pressed accidentally at first
The side buttons on the far side (i.e. right if you're right-handed) can easily be pressed when the user simply tries to grip the mouse. This can be mitigated with practice.
Con Slight inconsistent positive acceleration at all tracking speeds
Is lessened on hard pads, Steelseries recommends a 4hd/9hd as the mouse was made and tested on it. Most people don't realize the acceleration until told about it and there are numerous professional cs go, Lol, dota, and starcraft players who have no problem with or don't notice the acceleration.
Con All four buttons are hard to integrate into daily usage, but they are not always necessary.
Con Mouse wheel can be a little finicky
The mouse wheel tends to sometimes scroll up one click when trying to scroll down, and vice versa.
