TcpPeer vs TcpClient/TcpClientBase

I tried to look up the difference in TcpPeer and TcpClient but I am not seeing much info on it. TcpPeer says "Base class for Tcp client implementations." and TcpClient says "Provides methods to communicate with other photon server applications"

What is confusing though is it seems that TemporaryServerPeer creates a TcpPeer connection and not TcpClient? What ends up being used for what?