the material which is filling the oil is coming from the blood. clean up the blood, and the amount and type of material in the pull will change.
what this person has experienced is congruent with that. your experience is different for only one reason - your blood is not clean. now there can be a variety of reasons, both good and not so good, for this occurance in both of you. perhaps you release toxins easier. perhaps your liver is not filtering as well. perhaps you have a lot of clogged lymph tissue. maybe the other person is not able to kick into detox mode as fast as you. the timing of the pulls, how hydrated you both are, etc, etc.
one thing is certain - the stuff in the pulls is coming from your blood. that is the thing to remember.