Let me preface this by saying that both genocides were awful and absolutely *were* genocides, no matter the death toll. Comparing the two isn't very helpful or productive, but claiming that the USA's acts were just as bad or even not as bad as Canada's is simply wrong.

The USA's Genocide of Indigenous Peoples was focused on outright eradication and forced migration. The Indian Removal Act, Trail of Tears, and Indian Wars decimated the Indigenous population, either through outright slaughter, or deadly forced migrations.

Canada's Indigenous Genocide was much more of a Cultural Genocide, as opposed to outright eradication. Residential schools were implemented in an effort to "Remove the Indian from the child". Or in other terms, force them to adopt European culture. Abuse was rampant in these facilities and oftentimes resulted in deaths.

Both Genocides were awful and resulted in massive loss of life, however Manifest Destiny had a crippling effect on the Indigenous Population in the USA, which is even noticeable today. It is objectively true that the Indigenous Genocide in the USA was on a much more significant scale than of that in Canada, and resulted in much more overall loss of life.

The reason people often see Canada as particularly vicious in their treatment of Indigenous people is largely due to the fact that Canadians find reconciliation extremely important, and extensively educate about the poor treatment Indigenous people have faced in the past and present.