Hardened steel pinions

[glassdoctor]

Now I have a question about the gears...

I have a few RCM gears and only one of them was made from a clutch bell, with the more narrow pointy teeth. The others have a tooth shape just like the other gears, such as the (soft) Century ones and Megamotor ones. They don't look much different at all.

I haven't used any of them with steel spurs yet, and would prefer to not have to. But I am curious about how they would do, and if there's a difference between the older clutch-bell gear and the ones RCM has now, which look "normal".