These new classes follow the vert.x programming model closer than the generic ones so it will feel more natural to the end user to choose these instead of the official ones. There is no difference ...
I've been experimenting with this version recently, and I see the following exception in the logs: 2018-05-09 15:59:01.522-0700 vert.x-eventloop-thread-0 ERROR Unhandled exception java.io.IOException: ...