Yes, I ran two rigs at the same time for the MPH vs. NH test. Each was a single GTX 1080.
The miner software test was run consecutively, but I normalized earnings by using the average difficulty for each 24 hour period for each miner so they were evaluated based on the coins earned vs. their reported hashrate vs. the average difficulty for their 24 hour period.
Meanwhile, the ahashpool situation is concerning.
Hmm... the pool I was using for the Neoscrypt miner test finds a block every 2-4 minutes on average so that shouldn't result in more than about +/- 0.5% difference in earned coins over a 24 hour period. I could redo the test mining in parallel with a single GTX 1080 for each - as I am doing right now comparing dstm to bminer - but I seriously doubt that will erase the 20 percentage point difference I got between ccminer and hsrminer.
I should also note that what inspired me to do this test was that I switched my one real mining rig (6x GTX 1060) over from ZEN to TZC for a few hours because ZEN difficulty was straight up nuts (basically tripled) and I wanted a few more TZC for staking. Since hsrminer appeared to be faster that is what I used and I let it run for nearly 5 hours. After that time frame - while keeping an eye on the current difficulty on minethecoin.com - I found I had only earned about 75% of what I should have, so I decided to run ccminer klaust for 24 hours on the same pool then run hsrminer again, except this time for 24 hours; first hsrminer run (~5h) gave me 75% of expected earnings while second run (24h) gave me 70% of expected earnings. Klaust, sandwiched in between the two hsrminer runs, gave me 90% of expected earnings.