Still almost whichever you use it's linear response (except true thermistors) but you don't need a temp gauge to read exact temps, only "too hot", and "how close to too hot".
Like 400 degree head temps is an arbitrary number. the engines not at 400, it's not seizing because the pistons at 420 F. 400 is just the reading we get from heat soaked through to the spark plug and measured by the sensor we all use, so it's consistent between our shared experiences.
but again there's nothing magic about the number 400. or whatever it is you chose to stay under.
as long as your sensor is consistent and you know that whatever number your sensor reads when a tto would read 400, you're just as well off...