If electric bill is free, anything is profitable!
If your electricity bill if free then Ether is more profitable than Sumo (or other Cyyptonote coins), but I found that Ethash miners take about 20%-25% more electricity than Cryptonote miners. Even if Ether is more profitable if electricity cost are a factor then Sumo is more profitable.
I found I can't rely on Whattomine to give real-world power consumption values, mine are always higher than what Whattomine says.
My rig mining Ethash = 920 W, mining Cryptonote= 640 W from the wall. I love cryptonote for mining