Here are the results from my head-to-head comparison against Hashra.  I have two identical RPI setups with qty ten 5-chip miners each.  Since there is no way to distinguish between rigs on Nicehash's website, I used my BTC address for Hashra Controla and Michelem's donation BTC address for the Minera controller. 

Hashra's Dashboard and Nicehash stats
 

Minera's Dashboard, Settings, and Nicehash stats
   

Looking through the log, it looks like it took about 6 hours for the autotune process to finish.  Minera had FAR fewer rejects and HW.  It's hard to tell from a short run like this which is the ultimate winner, but I think that Minera has a solid edge over Hashra.