Fuji RAW File Converter

The Fuji X series cameras use a different kind of filter on the image sensor; instead of the usual Beyer filter they use an original Fuji design which they have named Trans X. This new design was inspired by the random nature of film and was designed to minimise Moire pattening and thus do away with the Anti-Aliasing filter.
Because of this the RAW files require a different kind of processing algorithm. The major software developers were slow to catch on so Fuji supplied their own software in the box with the cameras. 

Fuji RAW File Converter (FRFC) is based on the Silkypix RAW developer.

FRFC is not the most intuitive App I've ever used, in fact its GUI is pretty poor compared to Lr, and the manual reads like a Google translate from the original Japanese, but the results do appear to retain a little more fine detail than those processed in Lr. Its difficult to compare directly as there are no common controls so it might be possible to achieve the same results in either App if you knew the equivalent setting in each.

It looks as if a workflow for Trans X RAW files might be to convert to 16bit TIFF in FRFC then use Lr as normal.

Some images developed in FRFC

Converted to TIFF in FRFC processed in Lr

Processed, resized and converted to jpg in FRFC

Processed, resized and converted to jpg in FRFC

Converted to TIFF in FRFC processed
in Lr with DSLR Guru presets