Scorpion made the rockers thicker at the fulcrum tips sometime around 2011. I imagine the rockers Charlie broke the fulcrum on and Cliff’s pictures were both made before that.
None of the Scorpions are my first pick for a big roller cams, I think the Harlan Sharp’s HD rockers are tougher and better quality. Both are USA made though, and for milder street roller cams with less than .6” lift I would run either of those and not give it second thought. Not too long ago I did a Bullet SFT cam for a RA 4 stroker that runs those endurance scorpions.
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