I don't have the Hot Toys Perlman, but I think the Harbour is a much bigger body.
I have two of ARToys' version and think it might be bigger/taller than Hot Toys'. When I held the four sculpts against the 2019 they seemed small by comparison, so a HT sculpt might look pinheaded.
On the bigger body I prefer the more animalistic, 'beastly' Harbour head.
EDIT:
Just looked up Michael Crawford's original review for the Hot Toys Hellboy.
He was ridiculously tiny for 1/6.
The ARToys is bigger, and the 2019 bigger still.