incredibly horrible trade for Habs

Sooo, I see you dont read explanations....

Petry is worth more because he's an offensive dman and Brodin is a defensive dman + Petry is a veteran

both guys are top notch defenders off the rush (what you look for in today's NHL), Brodin a better defender in his own zone than Petry, and Petry more offensively talented than Brodin. I think you have to give the edge in value to Petry just based on him being more offensive and being a righty (which is more desirable in this market).

but to each their own. If a team needs a stay-at-home LD that can still put up decent offense, they might value Brodin higher. other than that, Petry > Brodin

Ok, sort of like who's worth more, Kuivo or Macdavid