Despite the latest USGS maps, all local sources, maps, and books I know of call this one Monte Christo. The unranked summit to the east is generally known as Superior (though usually "Mount Superior" instead of "Superior Peak".
http://listsofjohn.com/peak/18160
See here, for example:
https://books.google.com/books?id=CCfEU ... me&q=monte
I also have several maps (including topographic) with the above usage if you are interested in seeing some scans.
Also:
http://www.climb-utah.com/WM/superior.htm
Older USGS maps also label the eastern summit as Superior, including the 1903 "Cottonwood" USGS quad.
I assume that the latest USGS maps are a mistake?