Folding or feathering props would be an upgrade. You absolutely need to make sure you get the right diameter and pitch
for your boat/engine. I had a Max Prop before and one of the best things about it is that you can change the pitch
if needed to dial in a more efficient one (if needed). I am leaning towards getting a Flexofold one from Europe
though to replace my current
Flexofold was great in recommending a size and pitch. My current
one is both over sized and over-pitched and will not let me reach full engine
RPMs and I get black smoke because it overloads the motor
PYI (Max Prop) will advise you on prop size/pitch too.
Here is a good article about the subject: Folding and feathering propeller test
It compares the feathering and folding props to standard fixed props as well and gives the pros and cons of each. It seems to be a very good article. But you do need to have a good reason to change from what you have. You may find that here.