Crystal Ball 2000 Standard is an easy-to-use simulation program that helps you to analyze the risks and uncertainties associated with your Microsoft Excel spreadsheet models.
@RISK is an add-in to Microsoft Excel. As an add-in, @RISK becomes seamlessly integrated with your spreadsheet, adding risk analysis to your existing models.
I guess since they are add-in to Excel, be good to know which one is better. It is related to this board or not?