Please, watch this video to see how xlCompare compares Excel Files for differences.
We can continue this list, it is much longer that list of features you are getting from the Excel Add-in (WCT 3.3.9). Independence from Excel gives us more flexibility. The software works much faster than COM Add-in version and has much longer list of features. We've made the software as easy to use as posible. This is not always posible in the COM Add-in, limited by Excel's ribbon and object model.