if there is additional evidence such as blockchain transactions, then it will strengthen the accusation that both accounts are operated by the same person.
I always believe that there is no coincidence for people to create very identical usernames even on different platforms. but for now, there is no additional evidence to convict both accounts.
OP if you don't want to discuss what you started, better lock this thread.
There is an additional way to verify if they're alts.
This is done by asking the BJ team to verify their accounts by looking at their accounts on the BJ website. Even if they're using a VPN, there are still ways to verify it.