Fath al-Qadir expands the discussion to flour exchanged for sawiq derived from the same wheat. Abu Hanifa treats the residual genus connection and doubtful equality as prohibitive; the two disciples distinguish the products by their changed use and form. This is explanatory material from commentary, not a verbatim clause in the selected Quduri sentence.
With flour from one grain and whole grain from another, first establish whether the genera differ. The generic label “grain” is not by itself proof of one legal genus; the no-deferment rule based on a shared measuring modality must then be checked separately.