Hasselblad X1D II has a
51.0MP Medium format (44 x 33 mm ) sized CMOS sensor . On the other hand, Fujifilm GFX 100 has a
102.0MP Medium format (44 x 33 mm ) sized BSI-CMOS sensor and features X-Processor 4 processor.
Fujifilm GFX 100's sensor provides 51MP more than Hasselblad X1D II's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the X1D II 50C and GFX 100 sensor size comparison.
Sensor Size and Resolution Comparison image of Hasselblad X1D II and Fujifilm GFX 100 Cameras
Hasselblad X1D II and Fujifilm GFX 100 have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Hasselblad X1D II has 94% larger pixel area compared to Fujifilm GFX 100, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Hasselblad X1D II
or the
Fujifilm GFX 100 ,
including hyperfocal distance.