It's an upgraded cultivar of Grand Duke of Tuscany jasmine, which is the best possible jasmine for recipes that call for jasmine. Of which there are vanishingly few, but that's NOT the point, and if I wanted "common" herbs I'd grow oregano. I do grow oregano. Also beside the point.
Grand Duke is fussy and hard to grow and slow-growing and impossible to find. Grand Duke Supreme is faster-growing, less fussy, with bigger flowers, and it's even harder to find! I'm SOOO excited! In a "getting worked up about jasmine" sense of the word excited. Which is fairly sedate, all things considered.