If you wait and get the OTA, then most likely it would not require a data wipe and as such your settings would be kept. If you were to install the full ruu from the leaked ics, then you would have to do a data wipe, so you will have to redo all of your settings.
Also, if this leaked version is not the same as the OTA, then most likely, you will have to do a manual install through the official ruu similar to the leaked one here if you wished to get the OTA or future OTAs, and that would require another data wipe and loss of settings. Of course, if the leaked ics is the same as the OTA, then the next OTA should come automatically.
Thanks Got it