Very subjective I would say. The price difference is 30K.
SX is equipped with the following, which are not found in the KX:
* LED projector head lamp
* smart and power tail gate
* 7 inch meter cluster vs 3 inch
* LED fog lamp ( ice cube )
* leather with wood trim steering
* power driver Seat & front passenger
* roof rack
* blind spot collision warning system
* rear cross collision warning
* smart phone wireless charger
* memory seat for driver
* rear entertainment system ( 2 monitors )
* Leather seats

Highlighted in Bold letters are items you can upgrade for less than 10K, albeit thru after-market suppliers.