What exactly is the difference between using the scheduler + dhtmlxConnector and JavaPlanner? There seems to be quite a lot of overlap in their features and functionality.
They are two ways to use the same component.
Scheduler - javascript configuration, can be used with any backend
JavaPlanner - java configuration, integration and samples for major java frameworks.
Basically, if you don’t mind to work with JavaScript - choose Scheduler. If you want to stay in Java land the you can use JavaPlanner.