Stereo Volume Pot

Anyone knows what's the normal difference between channels when measured by DMM at any particular volume setting if pot is let's say 250K?
Clearly depends on the accuracy of the potentiometer - several kOhm in the example you are siting for sure.

Good Listening
Pots might vary the most at the lowest volume setting but it is difficult to talk about it in terms of resistance because volume pots are used as dividers (ratio of resistance). Max difference of these ratios is often specified by pot manufacturer - often up to 3dB for good pots.
Got new different volume control Alps similar that is used in Classe electronics and this one had difference with only few ohms 1 channel vs. another.