Fujifilm X-T200 has a
24.0MP APS-C (23.5 x 15.7 mm ) sized CMOS sensor . On the other hand, Samsung NX300 has a
20.0MP APS-C (23.5 x 15.7 mm ) sized CMOS sensor and features DRIMe IV processor.
Below you can see the X-T200 and NX300 sensor size comparison.
Fujifilm X-T200 and Samsung NX300 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 Samsung NX300 has 20% larger pixel area (18.48µm2 vs 15.37µm2) compared to Fujifilm X-T200, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.