A point or two ..
(a) QRH data is simplified and inflexible
(b) Vol 3 or similar is far more flexible but needs a modicum of interpretative skills
(c) the AFM and performance program outputs provide the most useful data
(d) there is no cogent reason why the speed schedule ought always to be minimum or always be maximum (as limited by the RTOW) for the runway in question. There are advantages and disadvantages to both. It ought to come down to either a standardisation issue (which is an operator/regulator negotiation matter) or a rational risk assessment and risk mitigation issue .....