When comparing Corsair Vengeance M60 vs Logitech G303, the Slant community recommends Logitech G303 for most people. In the question“What is the best gaming mouse?” Logitech G303 is ranked 14th while Corsair Vengeance M60 is ranked 34th. The most important reason people chose Logitech G303 is:
The G303, along with the Logitech G502 and G900 and the Corsair M65 PRO RGB, has the single best sensor on the market, the Pixart PMW3366. This sensor has no acceleration or angle snapping that can't be disabled and has a native DPI of 12,000.
Specs
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Pros
Pro Textured thumb rest
There is a textured thumb rest on the left side giving the user an area for their thumb to rest while also providing more grip for moving the mouse.
Pro Sniper button
The included sniper button will instantly decrease the mouses sensitivity while pressed in, giving the player an advantage accurately placing the cursor where it needs to be such as in headshots in an FPS.
Pro Aluminum housing
The M60 features a solid aluminum body at its core for a superior build quality.
Pro 8 programmable buttons
There are 8 fully programmable buttons on the mouse. This includes a 'sniper button' next to the thumb, which by default toggles a shifted DPI to allow for more accurate sniping while gaming.
Pro Adjustable weight and center of gravity
There are 3 removable weights in a triangle formation, allowing you to change not only the weight, but also the center of gravity.

Pro Excellent sensor
The G303, along with the Logitech G502 and G900 and the Corsair M65 PRO RGB, has the single best sensor on the market, the Pixart PMW3366. This sensor has no acceleration or angle snapping that can't be disabled and has a native DPI of 12,000.

Pro Compact size gaming mouse
People with small hands needn't look at mice like the Corsair M65 gaming mouse and despair. The G303 gaming mouse has a solution. It's about the size of the $5 USB mice that are often bundled with desktop computers, but it has most of the features of a full-size gaming mouse.
Pro Comfortable
Logitech G303 is very comfortable if you have medium to small hands, and if you are using your mouse with claw or fingertip grip.

Pro Accessible price
The G303 gaming mouse has an MSRP of $49.99, but it goes on sale rather frequently for as low as $24.99. Compared to high-end gaming mice like the Rival 700 and the G502, that's quite a steal.

Pro RGB lighting
It glows. You can change the colors. There isn't much more to say, except that it will fit in with basically any setup that uses black devices with colored lights.
Cons
Con Braided cable
The braided cable is stiff and may catch on the mouse pad on a regular basis.
Con Too light
The 3 weights and aluminum frame are just not heavy enough. If they were to add a weighted sled for more weight instead of 3 plugs, they could make it comfortable for a wider range of people. Satisfying both users who like light or heavy mice.
Con Finnish rubs off
The rubberized texture comes off the thumb rest and ring finger side around 2 months in. The slick plastic underneath is not a sure grip when moving around in game. Considering this is a gaming class mouse you would think they would use a textured finished material not a coating.
Con Laser sensor
The included Avago ADNS-9500 laser sensor is going to have trouble with acceleration.
Con Poor middle mouse button fail
Middle mouse button click stopped working reliably after about 2 months of negligible gaming.
Con Build quality not the best
Scrolling wheel sometimes makes cranking noises while you are scrolling through it. If you tighten the mouse from the sides, the cheap plastic will make a noise.
Con A minimum selection of buttons
The Logitech G303 only has one controllable button on the top, two buttons on the side and a programmable mousewheel. The mouse offers six different buttons if you include left- and right-click.
