I have both lenses. The 23/1.4 is capable of extraordinary results. Photos done with it have beautiful tonality. My particular lens is not really very sharp at f/1.4 but it's more than acceptable at other apertures. However, the lens is big and it's heavy in comparison to my other Fuji lenses. Used on an X-Pro body, especially when using the optional Fuji lens hood, it will intrude significantly into the OVF frame lines.
The 23/2 is small, light, focuses fast and quietly and is weather resistant. Optically, it's fine but not extraordinary. It's sharp and contrasty but somewhat clinical in its rendering. It's a much more user friendly choice for X-Pro owners who primarily use the OVF (I'm one myself) since it doesn't intrude into the bright lines of the viewfinder.
Personally, the 23/2 is permanently attached to one of my X-Pro1 bodies. Although I like the rendering of the f/1.4 version better, the XP1-23/2 package handles better for me and the resulting photographs look fine. The 23/1.4 sees occasional use on an X-T1 body where it doesn't have to contend with an OVF.