This video, released today by AE5X shows how well the RSPduo performs up against the Flex6300:

You can also read his blog here, where he interprets the results:

John writes “I’m amazed at the results. As I set up for the test I did so with the idea of finding out how far the RSPduo lagged behind the Flex in terms of performance. Never did I imagine that it would be the other way around!”