The dropdown menu on WikiTree is completely different and usually more accurate than the one employed on familysearch. I can't say I'm familiar with all the names on the place name spread sheet, but was led to assume that's where the dropdown menu on this site takes its cues from.
As Tommy said you should input the place name at the time of the event according to the agreed upon convention here but are free to input whatever you feel is the correct place as long as it isn't completely incorrect. For example, there's no shortage of French-Canadian profiles that say Québec, Canada when it should be Lower Canada or Canada East (Bas-Canada, Canada-Est) and most people don't lose sleep over it.