Wow, this is a friendship that I didn't see happening. Still, I like that Trudeau opened his country for Syrian refugees. That's very admirable for him despite the critics bashing him for it. I don't know though where other aspects he and Obama are similar with. Though I hope they continue working on making both countries happy neighbours.
They seem to be pretty similar when it comes to progressive thinking and their general attitude towards policy, and I think you can get that sense just by seeing how they interact. I would like to by a fly on the wall during that dinner or whatever they have, because I am sure they are talking about some interesting stuff.