Mining Profitability of BTC and BCH When I review sites like fork.lol and they speak of Mining Profitability of BTC and BCH, how are these calculated? I am trying to figure out how mining profits change between these two coins and how someone determines which one is more profitable, and why the highest profitability switches between BTC and BCH?
Source: fork.lol (PNG by me)

mining\space profitability$$\frac{\mathrm{BCH}}{\mathrm{BTC}}=\frac{\frac{(\mathrm {BCH\, block reward + estimated\, total\, transaction\, fees \, in \, a \, BCH \, block})\cdot (\mathrm {BCH\, exchange\, rate\, (in\, USD)})}{\mathrm {BCH\, block\, difficulty}}}{\frac{(\mathrm {BTC\, block reward + estimated\, total\, transaction\, fees \, in \, a \, BTC \, block})\cdot (\mathrm {BTC\, exchange\, rate\, (in\, USD)})}{\mathrm {BTC\, block\, difficulty}}}$$