Most profitability calculators only take the price/difficulty into consideration, but Fork also includes the fees. Fees being high now gives an edge to mining BTC over BCH.
Also note the BCH just yesterday moved from the BTC difficulty scheme of changing difficulty every 2016 blocks to one where each block gets a difficulty based on a 144 block rolling average. This will presumably dampen the difficulty oscillations somewhat.
https://fork.lol/
Most profitability calculators only take the price/difficulty into consideration, but Fork also includes the fees. Fees being high now gives an edge to mining BTC over BCH.
Also note the BCH just yesterday moved from the BTC difficulty scheme of changing difficulty every 2016 blocks to one where each block gets a difficulty based on a 144 block rolling average. This will presumably dampen the difficulty oscillations somewhat.