Originally Posted by chewy
I thought it was because stainless is stronger than aluminiuum so the blades can be made thinner and have less resistance in the water?
Stainless is also heavier, so it's harder to spin them up.
There's a whole bunch of variables that affect things going from Al to SS.
Bottom line is that you really need to try it before you decide, though that may be difficult if your chandler doesn't have a stable of test props.