Trying to get the 8bit to 10bit ADC Conversion formula right for Arduino with Temperature probe
I am somewhat confused by what you are actually doing and what the datasheet is talking about, but... The datasheet talks about if you are using the RawSensorValue that you need to divide by 4.095. Doing this on your numbers appear to bring your temperature down closer to what you think it should be. There can also be some accuracy differences between the two sensors. I suspect once you divide by the larger number you will be in spec of what you would expect between two different sensors.