i have had both. Both are excellent.
fuji 35mm- great for landscape and outdoor portraits, can be a bit too long indoors focus is fast and silent
sigma 30mm - great for indoor shots /portraits. Landscape is ok, except for bright backgrounds of trees for example-you will see lots of chromatic aberrations. Focus is fast and silent. Bigger, but still light.
both can be great choices
fuji 35mm- great for landscape and outdoor portraits, can be a bit too long indoors focus is fast and silent
sigma 30mm - great for indoor shots /portraits. Landscape is ok, except for bright backgrounds of trees for example-you will see lots of chromatic aberrations. Focus is fast and silent. Bigger, but still light.
both can be great choices