You made your choice. Good job! Now, here is my story. I hesitated to prefer one to another while looking at them side-by-side on my monitor screen. However, in the 16" by 20" prints competition I gravitated toward recognizing the painterly Sinar image as the winner. A quick poll among my guests also demonstrated that it was a choice of 9 out of 10 participants.
Does this outcome indicates that one system performs better than another? I am not sure.
Despite of the facts that:
a) an image generated by Sinar system contains 20 times more pixels as one generated by the Fuji camera,
b) each Sinar system photosite area is four times larger than Fuji photosite area,
c) Sinar lens area is 7 times larger than Fuji one
both images when displayed on a 24" monitor screen or viewed as 16"x20" prints visually contain similar amount of details.
It well might be that the reason of such preference is mainly psychological and has something to do with how a modern person of Western culture perceives images. Due to enormous differences in lens/sensor sizes the Sinar images have much smoother tonal transitions. Also the hundred years old lens causes more image imperfections than the modern Fuji lens. IMHO both factors influence the viewers perception of Sinar images such that they are rated as more pleasing and artistically significant than Fuji ones.
In conclusion, my feeling is that size of a camera matters...kind of.
Does it mean that from now on I will use Sinar as my walk around camera? Not until I get my personal Sherpa.
Postscript for technically inclined visitors
The Pictorialist image notes:
Camera used - Sinar P 4x5 system
Lens - Wollensak Velostigmat Series II 12", lens diameter - 52 mm (The Series II Velostigmat 12in f/4.5 sold new in 1922 for $146.50. In 2015 dollars that’s $2,046.83; similar to what one pays for a Nikon or Canon professional lens.)
Custom scanning digital back - based on Nikon D700 full frame body
Assembled system weight - around 19 lb
Due to digital back design limitations the actual 'sensor' size was approximately 3.5"x2.8" (6320 sq mm); it is smaller than the camera 4"x5" ground glass size, but it still has more than twice the area of a medium format image and 20 times larger than the Fuji sensor area (312 sq mm when cropped to fit 4:5 proportions).
Number of recorded pixels - approximately 260 MP
Sensor photosite (pixel) size - 8.45 microns
The Deco image notes:
Camera used - Fuji X100s
Lens - Fujinon 23 mm f/2, lens diameter - 20 mm
Assembled system weight - 0.98 lb
Number of recorded pixels - 13 MP (when original sensor size is cropped to fit 4:5 proportions).
Sensor photosite (pixel) size - 4.8 microns