the difference is because the bitcointalk is the first forum,
before the bitcointalk becomes as tight as it is now,
there were also a lot of spammers there, even a lot of them have multiple accounts,
and until finally merit rules emerged, which in essence would be difficult for newbies to have an account with rank there, I might not even think.
and I don't agree if it's quiet here, especially compared to bitcointalks,
because somehow altcointalks are still 1 year old, and bitcointalks are 9 years old, the difference is very far,
and I am very sure Altcointalks can be bigger 3-5 years to come.