A999/A500 Aluminum or Steel planetaries?

StrokerScamp said
We replace all the aluminum planets in the Torqueflite transmissions we build with the steel ones. Got piles of um to go in the scrap run. At the risk of another infraction, that's my thoughts.

Noted. That would mean the steel 15* 5-pinion planet for the OD is more durable than the 6-pinion aluminum, correct?

Another infraction?

Thanks for your help.