[Comparsion] What is the difference between PLANET GSW-1600/GSW-2400 and GSW-1600S/GSW-2400S?

Please note GSW-1600 and GSW-2400 are unmanaged Gigabit Ethernet Switch, the GSW-2400 also provide 2 mini-GBIC interface. The GSW-1600S/GSW-2400S increase Web interface for smart function management. Functions such as per port speed, duplex, flow control settings and QoS settings, Trunking and port-based VLAN, port Mirroring. And trap function for Switch events.