Platinum RTD temperature sensor choices between 1000ohm and 100ohm
Scatter gunning a few thoughts: -

Given that PTDs can be used in very fast thermally changing applications, using a PTD with a 1000 ohm resistance over a long (ish) length of cable may lead to the cable capacitance ruining the high frequency thermal perturbations that would have been seen more accurately with a lower resistance PTD.

Lower resistance PTDs exhibit lower thermal noise too.

On the other hand, for a given voltage change (for a given temperature change), a smaller excitation current is required for higher resistance PTDs. This can lead to less-self-heating and higher accuracy.

Higher resistance PTDs are less prone to errors due to cable resistance changing with temperature.