Not familiar with the Gustard N18 switch. I own the X26 PRO, A26, U18 and C18. However for the switch I went with the LHY SW-10 for the following reasons. 1) It has a connection for a master clock and 2) it can take an optical isolation feed in and put it out as ethernet. Both of these important things I use. Not sure about the N18 options. Will take a look at it.