Continuously linear implemented with an analog device vs digital “linear” (ie, watch your floats! Take care of quanization error! Have you kept the colors separated according to the Beyer pattern?).
No one has a problem with a mathematically perfect linear transformation, and film enlargers come very close to that ideal (yes they distort, but in a very obvious way and by degrading detail not adding detail that isn't there)
The analog picture is much harder doctor. More gracious artifacts in blow up (grains are random, versus sharp grid). Much more detail is recorded (by virtue of the size of the sensor and therefore the diffraction limit. Sensor resolution is not too useful).