I would tend to suggest a standard lens over the wide angle just because I find it more useful. Even with landscapes I often find that I prefer the fov of the standard over a wide. I've observed something in my own photographic composition. When using a wider lens my thoughts often center on "getting it all in". Get the whole mountain in, get the whole rock formation in, get the whole building in... etc. Of course there is nothing wrong with that, but when I use a standard focal length lens I am forced to pick and choose what to omit and what to include. That requires more thought and it feels like it is good for me and my photos.
If you have to buy both of these Texas Leicas and lug them around I guess you should ask yourself about the Mamiya 6 or Mamiya 7.