On the router the switch is able to run at 1000Mbs and it's able to transfer data through the switch and around the LAN at much higher rates than it can transfer from LAN to WAN or vice versa through the router. 200Mbs would be faster than nearly all home internet connections so it should be adequate.
The speeds posted in the Router Charts are routing performance, i.e. WAN to LAN and LAN to WAN. LAN to LAN transfers do not go through the routing section of the router, only the switch. So you will see "wire speed" performance, i.e. close to 100 Mbps or 1000 Mbps depending on the switch port and client adapter speed.
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