318 timing chain.....and why the engine should come out.

I wonder about the @50 number

I’ve seen cams with a smaller @50 and a larger advertised duration and it makes no sense

I was taught that the @50 was to accurately compare cams from many companies.

But then I see a lot of mixed up stuff.
A 262 with 218/224

Then see the he268 with 218/218

And I think the k6900
With like an advertised 285
But he @50 is much lower than even the 262.

Which cam is bigger?