I have made some calculations on CryptoNote based coins profitability yesterday:
DIFF is difficulty (Mh)
PRICE is price of 1 coin in BTC via
https://cryptonote.exchange.to/market/bcn/btcBR is block reward,
BR(BTC) is block reward price in BTC
PROF is mining profitability (BTC you get per 1Mh)
So my intuitive decision to switch my hash power back to BCN was after all correct.
I wonder whether this consideration indeed affect the miners' decisions (at least like me, on intuitive level). QCN's price dropped recently, and so did the difficulty. FCN had it vice versa.
Ironically, even with the current low value of BCN, it is still most profitable to mine. And even more ironically, due to the very "low" price nobody is mining. Come on people, if you compare BCN's price with MRO, just keep in mind that the number of total coins supply is 10,000 times larger than in MRO.