Compared: Zeiss Touit 12mm f/2.8 Distagon vs Fujifilm XF 14mm f/2.8 (X-E1, Bristlecone)
Added to Guide to Mirrorless is a comparison of the Zeiss Touit 12mm f/2.8 Distagon to the Fujifilm Fujinon XF 14mm f/2.8.
The field of view is significantly different, and so I also include commentary and thoughts on choosing between the two focal lengths.