Interesting that I've had 25K+ out of my ally baskets as compared to 22K ans the steel one was rooted off its titties!!
Aftermarket ones made with better tolerances?? Maybe??
Alloys can be as hard as all get out!! My alloy sprockets in my 2 strole race days were exceptionally tough!
Remember also that the steel basket is going to be heavier and slower to spin up as compared to the lighter alloy types.
You pays ya money and makes ya choice!