Are 2wd and 4wd ACT sensors the same?

My 4wd one is broke (the brass union has become detatched from the body of the sensor) and I have gotten hold of a 2wd from Ridgey

Upon measuing the resistance, the 2wd is at least 10k higer than the 4wd at the same temperature (room temp after being left for 30 mins).

Just wondering if there are any differences in the sensors between models really?

Cheers