When comparing Corsair Vengeance M65 vs Kensington Expert Mouse, the Slant community recommends Corsair Vengeance M65 for most people. In the question“What is the best gaming mouse?” Corsair Vengeance M65 is ranked 48th while Kensington Expert Mouse is ranked 55th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Sturdy mouse wheel
Pro Aluminium base with configurable weights
Pro Interesting futuristic design
The Corsair Vengeance M65 has a very interesting futuristic look to its design. With its metal core to the 3 plastic pieces on the outside of the frame and the over-sized scroll wheel.

Pro Comfortable and ergonomic
With thumb and pinky on the buttons and three fingers controlling the ball, the user's wrist lays flat on the table (or on the provided attachable wrist rest).

Pro Intuitive link between ball motion and FPS camera angle
The ball is large enough for turning it to feel like physically rotating an object.
Cons

Con Bad Palm Grip
With a design that is not ergonomic at the back and side buttons that are so far out it is not a recommended mouse for a mouse user who prefers palm grip.
Con Has input lag and smoothing
Being that this device is using a laser sensor there is expected lag and smoothing.
Con Not a mouse
This is a trackball, not a mouse.

Con Questionable secondary button defaults
The upper left button, which is the hardest to use, is middle click by default. The upper right, which the ring finger naturally rests near, defaults to Back. This can be particularly annoying as the Back button is easy to brush when moving hands between keyboard and mouse.
