In suprnova last week I was doing 450 XVG per day per miner, when whattomine says around 430. I have changed for two days to DGB and now the difficulty of XVG is down to 400k. Yesterday I switched again to XVG_MYGR (suprnova) and I don't have 24h yet on that 400k difficulty. But the hour earnings says all the time between 50-55 per hour for two machines (so 25-27 per machine). You can do the rest of the calculations.