Surf Hood bib inside or outside wetsuit

I am wondering if I should put the hood bib inside my wetsuit (the bib under the wetsuit neck) or the opposite way with the bib outside the wetsuit (the bib over the wetsuit neck). What is the warmest option and why?
The hood I have is:
https://surfing-waves.com/Item/JSxh53nblk/hyperflex_5_3mm_bibbed_surf_hood_black.htm
thanks
The hood I have is:
https://surfing-waves.com/Item/JSxh53nblk/hyperflex_5_3mm_bibbed_surf_hood_black.htm
thanks