Choose one device as the baseline
Set up the input device you use most often and keep its hardware settings stable during the comparison. For a mouse, note the selected DPI and any profile that changes it. For a controller, check whether dead-zone or response-curve options are active. Those controls influence the result alongside sensitivity, so changing all of them together makes the comparison difficult to interpret.
Use a familiar movement target, such as turning between two doors or following a moving object in a practice area. Adjust sensitivity in small steps until you can make broad turns and smaller corrections comfortably. A setting that permits an extremely fast turn may make fine adjustment awkward. The useful balance depends on the available mouse space or the stick's control range, not on a competitive player's published number.
Treat aiming modes separately
Games may expose different sensitivities for general camera movement, aiming, scopes or vehicles. Test those modes before assuming the main slider covers them. A multiplier can preserve a relationship to the base setting, but its meaning is game-specific. Read the label and compare the actual movement rather than assuming a value of one produces identical perceived motion in every view.
When switching from mouse to controller, expect a different relationship between movement and camera speed. A mouse typically responds to physical travel, while a stick's position commonly controls a rate of movement. Copying a numerical value does not bridge that difference. Establish a comfortable setting for each device using the same ordinary tasks, then save separate profiles if the game supports them.
Keep other sources of change visible
A different field of view, display size or seating distance can change how fast the camera appears to move. If sensitivity suddenly feels wrong after a graphics adjustment, review that change before rebuilding the input setup. Acceleration and smoothing can also affect the response, especially during quick movements. Test them independently if the game offers controls.
Keep notes of the final values and hardware profile. Revisit them after a device change or a clear problem, not after every missed action. Short, repeatable comparisons are more useful than constant random adjustment. If a setting causes discomfort or makes the camera difficult to follow, stop the test and return to the known comfortable configuration rather than forcing a long session.
