Nice tests and good comparison.
Would be good to see your results as well for GFS retention criteria. This for me at least is where Dedupe appliances such as the DD come into their own as a secondary storage target for longer term retention (backup copy jobs). Would be good to compare that against Server 2012 dedupe though as already requested
. For recovery speeds though, JBOD / Veeam Native is far quicker in my experience.