Mining Theory – Can the Crotch Be Forked? :) :)

So … BTC, BCH, BTG and BSV all trade at different prices / values.

All have said goodbye to BTC and have different development teams, theories, practices, technologies, etc.

I noticed that when you look at the number of coins mined on websites like coinmarketcap.com, the following circulation stocks are shown for each coin:

BTC = 18,287,125
BCH = 18,351,063
BSV = 18.348.240
BTG = 17,513,924

Are the amounts in circulation of coins (other than BTC) the amounts of coins mined after the BTC branch?

How is BTG's offer calculated since it is lower than BTC?

If one of these coins "wins" through the "best" technology, most TPS, etc., will they eventually all converge again into one coin? If / when this happens, will all values ​​become the same since they converge again into one coin?

Any light that someone could throw on it would be greatly appreciated!

Thank you very much,

JBJ