From my understanding, there is no benefit aside from saying a = b so mine a or b and its the same thing. So again, why mine tbc if it's the same as btc? If I'm mining btc already, what tangible benefit is there to switching to tbc or vice versa?
Cryptocurrencies don't exist for miners. Miners exist for cryptocurrencies.
I think it's perfectly reasonable to say nobody will just switch from BTC to TBC.
Rather, the switch would be entirely from decimal/metric to tonal (when interacting with others also making the switch).
Then you get the benefits of tonal being easier to work with universally.