Soy and refined soybean oil are wayyyy different in concentrations of linoleic acid, as well as in the stability of the fatty acids and the presence of degraded byproducts. Unrefined soy is plenty healthy for most people. Soybean oil is pure cancer and metabolic dysfunction.
Discussion
Ok but then why does op talk about what the chickens are fed? Are they fed oil or soy?
I don't know how body composition of chickens is affected by different feed compositions. It's not something I've researched. It is possible that if a chicken is fed a high linoleic acid diet its whole life, then its fat composition has a rather elevated linoleic acid composition, sufficient to reduce the rate at which some humans with particularly aggressive metabolic dysfunction can eliminate linoleic acid from our bodies to a suboptimal rate vs eating, say, grass fed beef.