Is this a cast or forged crank?

You can easily tell from the very FIRST picture it's a forged steel crank.

Found this pic on line. I believe top is forged, bottom cast. If that is so (and I've never had a cast slant six crank physically in my hands), they do look different, but not in the way cast vs. forged V8 cranks do. Please correct me if the bottom pic is not a cast slant six crank. The pic came from a Hot Rod article on building a hot slant six, and the cast crank was chosen because it was strong enough and a lot lighter.

Chrysler Slant Six Cylinder Engine - Mopar Muscle Magazine

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