INA168 vs INA169 High-side current sensing
The value of those input resistors is a factor in determining the gain. If you need high gain, choose the INA169. Lower gain, choose INA168.

From the INA169 datasheet:



The higher gain may allow you to use a lower RL, decreasing the output impedance of your sensing circuit.

As you noticed, the trade-off is higher quiescent current.