How can both a celsius scale thermometer and a kelvin scale thermometer indicate the same temperature change but not the same final temperature reading?

Absolute zero is the temperature at which enthalpy and entropy reaches zero. At this temperature the particles have no motion and they exert zero pressure.
In the Kelvin scale absolute zero is 0 K. Kelvin scale starts from absolute zero. At absolute zero, it’s -273.15 in the celcius scale .
Temperature in K = temperature in celcius + 273.15
However 1 unit in K scale = 1 unit in celcius scale
Therefore difference in both scales is the same.
Example - if there’s a temperature change of 10 degrees celcius, in the Kelvin scale the temperature change is 10 K .
But the temperature values in celcius and Kelvin scale have a difference of 273.15. Therefore values in both scales are different.