Repeater - A wireless repeater with DHCP & NAT enabled, clients on different subnet from host AP (primary router). Computers connected to one router can not see computers connected to other routers in Windows Network.
Client Mode - Join two wired networks by two Wireless routers (unbridged). Computers on one wired network can not see computers on other wired network in Windows Network.
As far as I can tell, both configurations...
Allow clients to connect to the internet/WAN via a wireless connection to a (host) AP.
Provide a separate subnet for clients.
Provide DHCP and NAT.
Allow wired as well as wireless client connections (provided a Virtual interface (VAP) with a unique SSID is configured).
What are the functional differences between Client and Repeater Wireless modes?
Things can depend on what router model (architecture) you have
My question does NOT relate to any particular router or architecture, but to the dd-wrt functionality difference between two specific wireless modes of dd-wrt, which is in line with forum guidelines, as far as I can determine.