Is there any Comparison between .NET Workflow RuleEngine and others e.g. NxBRE?

In our project, we need a rule engine component, after a short time research i found that that .NET Workflow also has it's rule engine. is there any complete comparison list between .NET Workflow Rule Engine and others, e.g. NxBRE, Droo开发者_StackOverflow社区l.NET... Thanks very much.

You can use FlexRule product as well; http://www.flexrule.com.

It is quit flexible and cost effective. It comes with Framework, Tester, Shell and Designer and supports differet engines; Procedural, Flow and Inference.

Regards Arash