There’s another notable difference between art-rawconverter and art-rawconverter-bin:
art-rawconverter will use the libs shipped with your distribution (e.g. Arch or Manjaro), while art-rawconverter-bin brings all required libs with versions defined by Alberto.
This especially means that art-rawconverter will not make use of libraw unless you manually switch to libraw-git as ART requires libraw 0.21 which has not been released yet. In this case ART will use the vendored dcraw.c which might result in strange behaviour - ART is going to switch to libraw for a reason. 