Gonna barge on in here with a quick snapshot of my mahogany soprano line up. I mostly play Tin Pan Alley and pre-war blues and novelty songs, and mahogany sopranos naturally fit the bill. All four get rotation. The early '50s Favilla is the loudest and barking-est. The same era Martin is less raw than the Favilla and has the same vintage vibe with a more balanced and sophisticated presentation. The Kiwaya has less of the vintage vibe but I would fairly say is the best sounding instrument of the bunch. The S1 cost considerably less than the others but truly holds its own in this pack, giving me a authentic-tone mahogany soprano that I can be less careful with.
I have other ukes made from different materials and in different sizes. They are all fun to play, but the soprano hogs get the most attention!