https://ville.montreal.qc.ca/portal/page?_dad=portal&_pageid=2762,3101387&_schema=PORTAL
1000_de_La_Gauchetiere has 51 floors. No other office building in Montreal has ever been permitted to reach 50 stories.
https://en.wikipedia.org/wiki/List_of_tallest_buildings_in_Montreal#Tallest_buildings
Montreal still has some taller buildings than Vancouver. However, both cities remain vertically stunted when compared to what's permitted in Melbourne, Toronto & Calgary.
https://dailyhive.com/vancouver/vancouver-view-cone-impacts-broadway-plan-cambie-street
https://storeys.com/james-cheng-the-stack-vancouver No office building in Vancouver has ever been allowed to have a 40th floor. The tallest nonresidential towers are in the 35 to 37 storey range.
https://macleans.ca/culture/building-vancouver-stack-work-life-balance/
https://therabbitportal.blogspot.com/search?q=Building+Height+Restrictions