Hello,
DJI FC350 = DJI Zenmuse X3 camera which has sensor size 6.17 x 4.55 mm. The only parameter that RC takes into account is the sensor width = 6.17mm.
The final image quality is composed not only by the sensor but optics too. So if you can see more image details in other cameras with the same sensor size then it’s most probably because of better optical lens used.
Hope it helps.