I am waiting to see your results from XVG, though the difficulty got up again on 600k so the earnings got reduced very hard. Now the website shows that for my last 24h hours I got 493 coins/miner.
The more interesting thing for me is that at the same time mining-dutch pool has 400k difficulty, which is much lower. And eventually thinking to switch there
To see which pool performs better, IMHO you should use 2 X10 units.
Start them in the same moment, one mining at suprnova, one at the other pool.
Stop them in the same moment, after at least 24 hours.
Then, you will be able to see which pool is the most profitable, even if pool luck is still a variable.