Example differenc is with On Entry action:
Web Designer:
drools:onEntry-script="System.out.println("On Entry Action");"
Eclipse drools designer:
<extensionElements>
<tns:onEntry-script scriptFormat="http://www.java.com/java">
<script>System.out.println("On Entry Action");</script>
</tns:onEntry-script>
</extensionElements>