wasn't I hoped they made some sense to someone
all the nismo arms are claimed to have different bushes material used than the nissan stuff
most are braced, different length for more camber more caster etc
pretty sure nismo mounts are again made with different material than nissan mounts so there more rigid
I've never cut open a brand new nissan mount compared to a brand new nismo mount never had a reason to doubt the claims
I've just tried rocking my motors before and after and noticed a difference which I guess your saying is just new compared to old
the graphs probably show the "improvement" claimed by trd