I am not sure you get for 100% the same CLT or IAT curves from one ECU to another... and really it does not take long to make a dozen of curve points.
Of course you should check the sensor for a possible offset on the resistance slope (given by the specs) of the sensor which is linear. But in any other approach one should do it as well.
You certainly don't...
Good example is the curve I have for US OBD2 BMW M52/S52... the curve and values are VASTLY different compared to the stock ECU. To the point it's not even worth using them at all. Maybe most aftermarket ECU's will be closer that I do not know.
all depends on the pullup resistors which are used inside ecu
if it had same one like any other aftermarket ecu you could use them from it, ecumaster has some values, vipec has some too, dont remember motec
but it all depends on internal pullup resistor