I have two different centences which is better? The heater can change the temperature more than the cooler. My results did support my hypothesis , but I wasn’t thinking that the heater can raise up

I have two different centences which is better? The heater can change the temperature more than the cooler. My results did support my hypothesis , but I wasn’t thinking that the heater can raise up to 115 celsius.

better or

The heater can change the temperature more than the cooler. My results did support my hypothesis , but I wasn’t expecting that the heater can raise up to 115 celsius.