Preferred way of message sending with NWclient/Server; individual msg vs List?

When you have a client-server connection based upon NetworkClient/Server on lets say a reliableTCPchannel... what kind of message sending is preferred?

Lets assume you got 100CC players, would it matter if you send out 100 individual messages to each player or would you want to collect them and send out a list to each player ?

Thanks