BCC is more profitable right now. and like you said it doesnt matter what you mine as long is the coin is high volume (BCC is) where you can just sell it for BTC once you mine it.
the real concern with BTC/BCC mining is the electricity or the payouts its the investnment. you cant mine those with GPU’s, you need ASIC miners… and 30 TH/s isnt something your going to achieve with just one asik miner.
Highest has on the market right now is Antminer S9 which is 14 TH/s. they are sold out and the first batch drops in sept, then oc and nov batches.
the september batches are going for $8000-$12000 on secondary markets. the october and november batches going for $3000-6000
the first batch will give you a really high ROI and the second batch who knows what the difficulty/profits per month will be by then.
I think ASIC mining litecoin or Dash is probaby more likely to yield your ROI… but same issue there… sourcing the asic miners before the difficutty goes up.
But for profits… the dash miner gets about 4X the profits the bitcoin S9 miner gets
also… with ASIC miners, you can only mine 1 algorithm so once the difficulty is too high and its not profitable you are left with a doorstop.
with GPU mining, you can mine any algorithm and once its not profitable you can sell the GPU to gamers