Similarities Differences
Both Trudeau (NAFTA talks) and Laurier (Naval Services Act, Manitoba Schools Question, Alaskan Border Dispute) practice sunny ways, or persuasion through open negotiation. They approach situation with open minds and listen to all sides before making decisions.

Both Trudeau (investments in immigration and Indigenous policies) and Laurier (Manitoba Schools Question, Naval Services Act) protect the rights of minority groups of Canada.

Both Trudeau (removal of fighter jets in Syria, REASSURANCE, UNIFIER) and Laurier (The Boer War) strategically played a limited, but important role in overseas conflict. This prevented Canadians from becoming too invested in these conflicts, while still allowing them to support their allies.

Though they both practice sunny ways, Laurier always seeked compromise (Naval Services Act, Manitoba Schools Question, Alaskan Border Dispute), whereas Trudeau sometimes makes a decision for the greater good (Trans Mountain Pipeline).

Laurier considered Canadians as a single group of people. This is shown by his compromises. Trudeau considers different groups of Canadians as separate entities. Many of his comments, including his reference to Canada as a postnational state suggest this.

Laurier worked on protecting Canadians from outside threats by developing an independent Navy (Naval Services Act). Trudeau works on helping Canadians internally by investing in Social Infrastructure and Nutrition North, allowing more affordable living.

Sources:

https://www.theguardian.com/world/2017/jan/04/the-canada-experiment-is-this-the-worlds-first-postnational-country

http://www.cbc.ca/news/politics/trudeau-speech-indigenous-rights- 1.4534679

http://www.cbc.ca/news/politics/government-position-fighter-jets-1.3338186

http://www.thecanadianencyclopedia.ca/en/article/laurier-the-first-canadian-feature/