Response differences of gut microbiota in oligofructose and inulin are determined by the initial gut Bacteroides/Bifidobacterium ratios  Indicates difference of response.
Bacteroides/Bifidobacterium (Ba/Bi) ratios “with Low Ratio showing a significant increase in propionic acid and being enriched in glycolysis functions, whereas High was enriched in amino acids and aminoglycolysis functions”
Of course, the question becomes what are low and high ratio? To answer that question, I pulled some data by lab
I would suggest a ratio > 500 to 1000 is High, Below 200 is low