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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?

Already have Monte Cristo as an alternate, with the source credited:
http://listsofjohn.com/reference?id=18160