1. Intention — Hanafi: not required for validity; Shafi‘i: required. 2. Order — Hanafi: emphasized sunnah; Shafi‘i: obligatory. 3. Continuity — Hanafi: sunnah; Malik: obligatory. 4. Neck wiping — differently classified as sunnah, recommended or etiquette, with disagreement also over its evidential support.
These are different kinds of disputes and should not be flattened into a single disagreement.