This is the best prop analysis I have seen. I am a fan of Flexofold. They are good folks to deal with. You also get a lot less propwalk . Only downside is price but folders are cheaper than featherers
https://www.yachtingmonthly.com/gear/folding-and-feathering-propeller-test-29807
Bruce Clark. N30, Nonsuch, Whitby YC, Lake Ontario