There are a few exceptions. There are some things that don't transfer, even with the settings files. This includes things like tach and hobbs time and a few other things (I don't have an authoritative list handy). Most of the things that aren't transferred aren't because, in most cases, settings exports and imports are used to transfer settings among different aircraft of the same type, and there are things that you don't want transferred in these cases.
If you actually had a unit that was replacing another in the same aircraft, that's probably happened because of an issue with that display that caused it to come back here for repair. In that case, when it's here for repair, we actually do backup ALL of the settings so that the display you get back is virtually identical to the one you sent.
Also, know that if you have a new display that's connected to an already-configured display via SkyView Network, the new one (the system knows that tail numbers of DYNON haven't been configured) adopts the full configuration of the already-configured display as it joins the network. So this can also be used to get a complete transfer of settings from one display to another, (excepting the things that are listed under "local display setup").