I will establish a distinction that has gone unnoticed in the previous literature (Matthewson 01, Hackl 09, Coppock et al. 17) between two proportional MOSTs in non-partitives. I will propose that both of the two MOSTs are quantificational Determiners (contra Hackl’s widely assumed superlative analysis), which nevertheless differ in semantic type: one of them denotes relations between sets (see th...