AlmostEqual

public static bool AlmostEqual(Vector3 v1, Vector3 v2, float precision)
{
    bool equal = true;
    if (Mathf.Abs(v1.x - v2.x) > precision) equal = false;
    if (Mathf.Abs(v1.y - v2.y) > precision) equal = false;
    if (Mathf.Abs(v1.z - v2.z) > precision) equal = false;
    return equal;
}