Setting Compare Options - Common Tab

Units

These options are common to all Compare utilities.

Select an item in Linear units or Angular units and set the parameter values.
Changing the linear or angular units does not change the units of the solid model. These units are for display of Compare results only.

Tolerance

Move the Position tolerance and Angle tolerance sliders for a finer or coarser tolerance. To perform a comparison with new tolerances, you must run Compare again.
  Position tolerance During face comparison, Compare Geometry compares the position of vertex coordinates and some surface points of face pairs. Vertices or points that lie within a specified position tolerance are considered identical.
  Angle Tolerance During face comparison, Compare Geometry compares the parallelism of the edges of face pairs. If the edges are curved, tangents to the curves are compared. The faces are identical if the angle between their corresponding edges is less than the specified angle tolerance.