/**\r
* Object comparator that uses type of objects to check if objects are comparable. \r
* \r
- * Difference value is amount of properties that have different values.\r
+ * Difference value is amount of properties that have different values. If objects have no properties, the result is 0 (unreliable).\r
+ * \r
* \r
* @author Marko Luukkainen <marko.luukkainen@vtt.fi>\r
*\r