In racing environments aluminum winches
do not seem to last as long and tend to get sloppy. We were just discussing this last week as a matter of fact.
The boat I race on in the summers (Ericson 35-3) came with all aluminum winches
in 1987. Every one has since been replaced with Harken
The boat I race on in the fall series came with all chromed bronze winches
in 1987 (Ericson 34). These are the same winches
as on the 87 35-3 just chromed bronze. All of the chromed bronze winches still perform perfectly & flawlessly with zero slop.
It is our guess comparing these nearly identical boats with nearly identical race histories, use and winch maintenance that the bearing loads wear or elongate the softer aluminum races much quicker than they would on a bronze winch thus resulting in winch slop.
P.S. Replacing the winches on this 35-3 was about a $4500.00 expenditure that the 34 did not have to spend.
On a 22 footer it may not make a difference but I certainly prefer chromed bronze or stainless like the Andersons.