In Guide to Mirrorless.
This three-way comparison follows the Dilapidated Green House comparison and is also very instructive on these three cameras. (Fujifilm X-E1 with Fujinon XF 18mm f/2 lens).
Ancient Bristlecone Graveyard
Get Ricoh GR or Sigma DP Merrill or Fujifilm X-E1 at B&H Photo.