Car hinges manufacturing process

I'm doing a research on car hinges (door, hood and tail gate hinges).
I've found that there were three different manufacturing processes to
built a hinge. Stamping (metal sheets), hot rolled profiling and
forging. I found a few information calling different hinge
manufacturers: stamped hinge are the least expensive. Profilled hinges
are heavier, yet stronger, occupies less space (in a 3D space: the
hinge itself is more voluminous) and a little more expensive and
finally forged hinges are smaller, lighter and even stronger. I wanted
to be sure of the info I had and if anybody could give some more
informations on each technology and what could be the trade-off when
having to choose between each one.
Thanks in advance to everybody!
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